Index: frontend/node_modules/big.js/big.mjs
===================================================================
--- frontend/node_modules/big.js/big.mjs	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/big.js/big.mjs	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,924 @@
+/*
+ *  big.js v5.2.2
+ *  A small, fast, easy-to-use library for arbitrary-precision decimal arithmetic.
+ *  Copyright (c) 2018 Michael Mclaughlin <M8ch88l@gmail.com>
+ *  https://github.com/MikeMcl/big.js/LICENCE
+ */
+
+
+/************************************** EDITABLE DEFAULTS *****************************************/
+
+
+  // The default values below must be integers within the stated ranges.
+
+  /*
+   * The maximum number of decimal places (DP) of the results of operations involving division:
+   * div and sqrt, and pow with negative exponents.
+   */
+var DP = 20,          // 0 to MAX_DP
+
+  /*
+   * The rounding mode (RM) used when rounding to the above decimal places.
+   *
+   *  0  Towards zero (i.e. truncate, no rounding).       (ROUND_DOWN)
+   *  1  To nearest neighbour. If equidistant, round up.  (ROUND_HALF_UP)
+   *  2  To nearest neighbour. If equidistant, to even.   (ROUND_HALF_EVEN)
+   *  3  Away from zero.                                  (ROUND_UP)
+   */
+  RM = 1,             // 0, 1, 2 or 3
+
+  // The maximum value of DP and Big.DP.
+  MAX_DP = 1E6,       // 0 to 1000000
+
+  // The maximum magnitude of the exponent argument to the pow method.
+  MAX_POWER = 1E6,    // 1 to 1000000
+
+  /*
+   * The negative exponent (NE) at and beneath which toString returns exponential notation.
+   * (JavaScript numbers: -7)
+   * -1000000 is the minimum recommended exponent value of a Big.
+   */
+  NE = -7,            // 0 to -1000000
+
+  /*
+   * The positive exponent (PE) at and above which toString returns exponential notation.
+   * (JavaScript numbers: 21)
+   * 1000000 is the maximum recommended exponent value of a Big.
+   * (This limit is not enforced or checked.)
+   */
+  PE = 21,            // 0 to 1000000
+
+
+/**************************************************************************************************/
+
+
+  // Error messages.
+  NAME = '[big.js] ',
+  INVALID = NAME + 'Invalid ',
+  INVALID_DP = INVALID + 'decimal places',
+  INVALID_RM = INVALID + 'rounding mode',
+  DIV_BY_ZERO = NAME + 'Division by zero',
+
+  // The shared prototype object.
+  P = {},
+  UNDEFINED = void 0,
+  NUMERIC = /^-?(\d+(\.\d*)?|\.\d+)(e[+-]?\d+)?$/i;
+
+
+/*
+ * Create and return a Big constructor.
+ *
+ */
+function _Big_() {
+
+  /*
+   * The Big constructor and exported function.
+   * Create and return a new instance of a Big number object.
+   *
+   * n {number|string|Big} A numeric value.
+   */
+  function Big(n) {
+    var x = this;
+
+    // Enable constructor usage without new.
+    if (!(x instanceof Big)) return n === UNDEFINED ? _Big_() : new Big(n);
+
+    // Duplicate.
+    if (n instanceof Big) {
+      x.s = n.s;
+      x.e = n.e;
+      x.c = n.c.slice();
+    } else {
+      parse(x, n);
+    }
+
+    /*
+     * Retain a reference to this Big constructor, and shadow Big.prototype.constructor which
+     * points to Object.
+     */
+    x.constructor = Big;
+  }
+
+  Big.prototype = P;
+  Big.DP = DP;
+  Big.RM = RM;
+  Big.NE = NE;
+  Big.PE = PE;
+  Big.version = '5.2.2';
+
+  return Big;
+}
+
+
+/*
+ * Parse the number or string value passed to a Big constructor.
+ *
+ * x {Big} A Big number instance.
+ * n {number|string} A numeric value.
+ */
+function parse(x, n) {
+  var e, i, nl;
+
+  // Minus zero?
+  if (n === 0 && 1 / n < 0) n = '-0';
+  else if (!NUMERIC.test(n += '')) throw Error(INVALID + 'number');
+
+  // Determine sign.
+  x.s = n.charAt(0) == '-' ? (n = n.slice(1), -1) : 1;
+
+  // Decimal point?
+  if ((e = n.indexOf('.')) > -1) n = n.replace('.', '');
+
+  // Exponential form?
+  if ((i = n.search(/e/i)) > 0) {
+
+    // Determine exponent.
+    if (e < 0) e = i;
+    e += +n.slice(i + 1);
+    n = n.substring(0, i);
+  } else if (e < 0) {
+
+    // Integer.
+    e = n.length;
+  }
+
+  nl = n.length;
+
+  // Determine leading zeros.
+  for (i = 0; i < nl && n.charAt(i) == '0';) ++i;
+
+  if (i == nl) {
+
+    // Zero.
+    x.c = [x.e = 0];
+  } else {
+
+    // Determine trailing zeros.
+    for (; nl > 0 && n.charAt(--nl) == '0';);
+    x.e = e - i - 1;
+    x.c = [];
+
+    // Convert string to array of digits without leading/trailing zeros.
+    for (e = 0; i <= nl;) x.c[e++] = +n.charAt(i++);
+  }
+
+  return x;
+}
+
+
+/*
+ * Round Big x to a maximum of dp decimal places using rounding mode rm.
+ * Called by stringify, P.div, P.round and P.sqrt.
+ *
+ * x {Big} The Big to round.
+ * dp {number} Integer, 0 to MAX_DP inclusive.
+ * rm {number} 0, 1, 2 or 3 (DOWN, HALF_UP, HALF_EVEN, UP)
+ * [more] {boolean} Whether the result of division was truncated.
+ */
+function round(x, dp, rm, more) {
+  var xc = x.c,
+    i = x.e + dp + 1;
+
+  if (i < xc.length) {
+    if (rm === 1) {
+
+      // xc[i] is the digit after the digit that may be rounded up.
+      more = xc[i] >= 5;
+    } else if (rm === 2) {
+      more = xc[i] > 5 || xc[i] == 5 &&
+        (more || i < 0 || xc[i + 1] !== UNDEFINED || xc[i - 1] & 1);
+    } else if (rm === 3) {
+      more = more || !!xc[0];
+    } else {
+      more = false;
+      if (rm !== 0) throw Error(INVALID_RM);
+    }
+
+    if (i < 1) {
+      xc.length = 1;
+
+      if (more) {
+
+        // 1, 0.1, 0.01, 0.001, 0.0001 etc.
+        x.e = -dp;
+        xc[0] = 1;
+      } else {
+
+        // Zero.
+        xc[0] = x.e = 0;
+      }
+    } else {
+
+      // Remove any digits after the required decimal places.
+      xc.length = i--;
+
+      // Round up?
+      if (more) {
+
+        // Rounding up may mean the previous digit has to be rounded up.
+        for (; ++xc[i] > 9;) {
+          xc[i] = 0;
+          if (!i--) {
+            ++x.e;
+            xc.unshift(1);
+          }
+        }
+      }
+
+      // Remove trailing zeros.
+      for (i = xc.length; !xc[--i];) xc.pop();
+    }
+  } else if (rm < 0 || rm > 3 || rm !== ~~rm) {
+    throw Error(INVALID_RM);
+  }
+
+  return x;
+}
+
+
+/*
+ * Return a string representing the value of Big x in normal or exponential notation.
+ * Handles P.toExponential, P.toFixed, P.toJSON, P.toPrecision, P.toString and P.valueOf.
+ *
+ * x {Big}
+ * id? {number} Caller id.
+ *         1 toExponential
+ *         2 toFixed
+ *         3 toPrecision
+ *         4 valueOf
+ * n? {number|undefined} Caller's argument.
+ * k? {number|undefined}
+ */
+function stringify(x, id, n, k) {
+  var e, s,
+    Big = x.constructor,
+    z = !x.c[0];
+
+  if (n !== UNDEFINED) {
+    if (n !== ~~n || n < (id == 3) || n > MAX_DP) {
+      throw Error(id == 3 ? INVALID + 'precision' : INVALID_DP);
+    }
+
+    x = new Big(x);
+
+    // The index of the digit that may be rounded up.
+    n = k - x.e;
+
+    // Round?
+    if (x.c.length > ++k) round(x, n, Big.RM);
+
+    // toFixed: recalculate k as x.e may have changed if value rounded up.
+    if (id == 2) k = x.e + n + 1;
+
+    // Append zeros?
+    for (; x.c.length < k;) x.c.push(0);
+  }
+
+  e = x.e;
+  s = x.c.join('');
+  n = s.length;
+
+  // Exponential notation?
+  if (id != 2 && (id == 1 || id == 3 && k <= e || e <= Big.NE || e >= Big.PE)) {
+    s = s.charAt(0) + (n > 1 ? '.' + s.slice(1) : '') + (e < 0 ? 'e' : 'e+') + e;
+
+  // Normal notation.
+  } else if (e < 0) {
+    for (; ++e;) s = '0' + s;
+    s = '0.' + s;
+  } else if (e > 0) {
+    if (++e > n) for (e -= n; e--;) s += '0';
+    else if (e < n) s = s.slice(0, e) + '.' + s.slice(e);
+  } else if (n > 1) {
+    s = s.charAt(0) + '.' + s.slice(1);
+  }
+
+  return x.s < 0 && (!z || id == 4) ? '-' + s : s;
+}
+
+
+// Prototype/instance methods
+
+
+/*
+ * Return a new Big whose value is the absolute value of this Big.
+ */
+P.abs = function () {
+  var x = new this.constructor(this);
+  x.s = 1;
+  return x;
+};
+
+
+/*
+ * Return 1 if the value of this Big is greater than the value of Big y,
+ *       -1 if the value of this Big is less than the value of Big y, or
+ *        0 if they have the same value.
+*/
+P.cmp = function (y) {
+  var isneg,
+    x = this,
+    xc = x.c,
+    yc = (y = new x.constructor(y)).c,
+    i = x.s,
+    j = y.s,
+    k = x.e,
+    l = y.e;
+
+  // Either zero?
+  if (!xc[0] || !yc[0]) return !xc[0] ? !yc[0] ? 0 : -j : i;
+
+  // Signs differ?
+  if (i != j) return i;
+
+  isneg = i < 0;
+
+  // Compare exponents.
+  if (k != l) return k > l ^ isneg ? 1 : -1;
+
+  j = (k = xc.length) < (l = yc.length) ? k : l;
+
+  // Compare digit by digit.
+  for (i = -1; ++i < j;) {
+    if (xc[i] != yc[i]) return xc[i] > yc[i] ^ isneg ? 1 : -1;
+  }
+
+  // Compare lengths.
+  return k == l ? 0 : k > l ^ isneg ? 1 : -1;
+};
+
+
+/*
+ * Return a new Big whose value is the value of this Big divided by the value of Big y, rounded,
+ * if necessary, to a maximum of Big.DP decimal places using rounding mode Big.RM.
+ */
+P.div = function (y) {
+  var x = this,
+    Big = x.constructor,
+    a = x.c,                  // dividend
+    b = (y = new Big(y)).c,   // divisor
+    k = x.s == y.s ? 1 : -1,
+    dp = Big.DP;
+
+  if (dp !== ~~dp || dp < 0 || dp > MAX_DP) throw Error(INVALID_DP);
+
+  // Divisor is zero?
+  if (!b[0]) throw Error(DIV_BY_ZERO);
+
+  // Dividend is 0? Return +-0.
+  if (!a[0]) return new Big(k * 0);
+
+  var bl, bt, n, cmp, ri,
+    bz = b.slice(),
+    ai = bl = b.length,
+    al = a.length,
+    r = a.slice(0, bl),   // remainder
+    rl = r.length,
+    q = y,                // quotient
+    qc = q.c = [],
+    qi = 0,
+    d = dp + (q.e = x.e - y.e) + 1;    // number of digits of the result
+
+  q.s = k;
+  k = d < 0 ? 0 : d;
+
+  // Create version of divisor with leading zero.
+  bz.unshift(0);
+
+  // Add zeros to make remainder as long as divisor.
+  for (; rl++ < bl;) r.push(0);
+
+  do {
+
+    // n is how many times the divisor goes into current remainder.
+    for (n = 0; n < 10; n++) {
+
+      // Compare divisor and remainder.
+      if (bl != (rl = r.length)) {
+        cmp = bl > rl ? 1 : -1;
+      } else {
+        for (ri = -1, cmp = 0; ++ri < bl;) {
+          if (b[ri] != r[ri]) {
+            cmp = b[ri] > r[ri] ? 1 : -1;
+            break;
+          }
+        }
+      }
+
+      // If divisor < remainder, subtract divisor from remainder.
+      if (cmp < 0) {
+
+        // Remainder can't be more than 1 digit longer than divisor.
+        // Equalise lengths using divisor with extra leading zero?
+        for (bt = rl == bl ? b : bz; rl;) {
+          if (r[--rl] < bt[rl]) {
+            ri = rl;
+            for (; ri && !r[--ri];) r[ri] = 9;
+            --r[ri];
+            r[rl] += 10;
+          }
+          r[rl] -= bt[rl];
+        }
+
+        for (; !r[0];) r.shift();
+      } else {
+        break;
+      }
+    }
+
+    // Add the digit n to the result array.
+    qc[qi++] = cmp ? n : ++n;
+
+    // Update the remainder.
+    if (r[0] && cmp) r[rl] = a[ai] || 0;
+    else r = [a[ai]];
+
+  } while ((ai++ < al || r[0] !== UNDEFINED) && k--);
+
+  // Leading zero? Do not remove if result is simply zero (qi == 1).
+  if (!qc[0] && qi != 1) {
+
+    // There can't be more than one zero.
+    qc.shift();
+    q.e--;
+  }
+
+  // Round?
+  if (qi > d) round(q, dp, Big.RM, r[0] !== UNDEFINED);
+
+  return q;
+};
+
+
+/*
+ * Return true if the value of this Big is equal to the value of Big y, otherwise return false.
+ */
+P.eq = function (y) {
+  return !this.cmp(y);
+};
+
+
+/*
+ * Return true if the value of this Big is greater than the value of Big y, otherwise return
+ * false.
+ */
+P.gt = function (y) {
+  return this.cmp(y) > 0;
+};
+
+
+/*
+ * Return true if the value of this Big is greater than or equal to the value of Big y, otherwise
+ * return false.
+ */
+P.gte = function (y) {
+  return this.cmp(y) > -1;
+};
+
+
+/*
+ * Return true if the value of this Big is less than the value of Big y, otherwise return false.
+ */
+P.lt = function (y) {
+  return this.cmp(y) < 0;
+};
+
+
+/*
+ * Return true if the value of this Big is less than or equal to the value of Big y, otherwise
+ * return false.
+ */
+P.lte = function (y) {
+  return this.cmp(y) < 1;
+};
+
+
+/*
+ * Return a new Big whose value is the value of this Big minus the value of Big y.
+ */
+P.minus = P.sub = function (y) {
+  var i, j, t, xlty,
+    x = this,
+    Big = x.constructor,
+    a = x.s,
+    b = (y = new Big(y)).s;
+
+  // Signs differ?
+  if (a != b) {
+    y.s = -b;
+    return x.plus(y);
+  }
+
+  var xc = x.c.slice(),
+    xe = x.e,
+    yc = y.c,
+    ye = y.e;
+
+  // Either zero?
+  if (!xc[0] || !yc[0]) {
+
+    // y is non-zero? x is non-zero? Or both are zero.
+    return yc[0] ? (y.s = -b, y) : new Big(xc[0] ? x : 0);
+  }
+
+  // Determine which is the bigger number. Prepend zeros to equalise exponents.
+  if (a = xe - ye) {
+
+    if (xlty = a < 0) {
+      a = -a;
+      t = xc;
+    } else {
+      ye = xe;
+      t = yc;
+    }
+
+    t.reverse();
+    for (b = a; b--;) t.push(0);
+    t.reverse();
+  } else {
+
+    // Exponents equal. Check digit by digit.
+    j = ((xlty = xc.length < yc.length) ? xc : yc).length;
+
+    for (a = b = 0; b < j; b++) {
+      if (xc[b] != yc[b]) {
+        xlty = xc[b] < yc[b];
+        break;
+      }
+    }
+  }
+
+  // x < y? Point xc to the array of the bigger number.
+  if (xlty) {
+    t = xc;
+    xc = yc;
+    yc = t;
+    y.s = -y.s;
+  }
+
+  /*
+   * Append zeros to xc if shorter. No need to add zeros to yc if shorter as subtraction only
+   * needs to start at yc.length.
+   */
+  if ((b = (j = yc.length) - (i = xc.length)) > 0) for (; b--;) xc[i++] = 0;
+
+  // Subtract yc from xc.
+  for (b = i; j > a;) {
+    if (xc[--j] < yc[j]) {
+      for (i = j; i && !xc[--i];) xc[i] = 9;
+      --xc[i];
+      xc[j] += 10;
+    }
+
+    xc[j] -= yc[j];
+  }
+
+  // Remove trailing zeros.
+  for (; xc[--b] === 0;) xc.pop();
+
+  // Remove leading zeros and adjust exponent accordingly.
+  for (; xc[0] === 0;) {
+    xc.shift();
+    --ye;
+  }
+
+  if (!xc[0]) {
+
+    // n - n = +0
+    y.s = 1;
+
+    // Result must be zero.
+    xc = [ye = 0];
+  }
+
+  y.c = xc;
+  y.e = ye;
+
+  return y;
+};
+
+
+/*
+ * Return a new Big whose value is the value of this Big modulo the value of Big y.
+ */
+P.mod = function (y) {
+  var ygtx,
+    x = this,
+    Big = x.constructor,
+    a = x.s,
+    b = (y = new Big(y)).s;
+
+  if (!y.c[0]) throw Error(DIV_BY_ZERO);
+
+  x.s = y.s = 1;
+  ygtx = y.cmp(x) == 1;
+  x.s = a;
+  y.s = b;
+
+  if (ygtx) return new Big(x);
+
+  a = Big.DP;
+  b = Big.RM;
+  Big.DP = Big.RM = 0;
+  x = x.div(y);
+  Big.DP = a;
+  Big.RM = b;
+
+  return this.minus(x.times(y));
+};
+
+
+/*
+ * Return a new Big whose value is the value of this Big plus the value of Big y.
+ */
+P.plus = P.add = function (y) {
+  var t,
+    x = this,
+    Big = x.constructor,
+    a = x.s,
+    b = (y = new Big(y)).s;
+
+  // Signs differ?
+  if (a != b) {
+    y.s = -b;
+    return x.minus(y);
+  }
+
+  var xe = x.e,
+    xc = x.c,
+    ye = y.e,
+    yc = y.c;
+
+  // Either zero? y is non-zero? x is non-zero? Or both are zero.
+  if (!xc[0] || !yc[0]) return yc[0] ? y : new Big(xc[0] ? x : a * 0);
+
+  xc = xc.slice();
+
+  // Prepend zeros to equalise exponents.
+  // Note: reverse faster than unshifts.
+  if (a = xe - ye) {
+    if (a > 0) {
+      ye = xe;
+      t = yc;
+    } else {
+      a = -a;
+      t = xc;
+    }
+
+    t.reverse();
+    for (; a--;) t.push(0);
+    t.reverse();
+  }
+
+  // Point xc to the longer array.
+  if (xc.length - yc.length < 0) {
+    t = yc;
+    yc = xc;
+    xc = t;
+  }
+
+  a = yc.length;
+
+  // Only start adding at yc.length - 1 as the further digits of xc can be left as they are.
+  for (b = 0; a; xc[a] %= 10) b = (xc[--a] = xc[a] + yc[a] + b) / 10 | 0;
+
+  // No need to check for zero, as +x + +y != 0 && -x + -y != 0
+
+  if (b) {
+    xc.unshift(b);
+    ++ye;
+  }
+
+  // Remove trailing zeros.
+  for (a = xc.length; xc[--a] === 0;) xc.pop();
+
+  y.c = xc;
+  y.e = ye;
+
+  return y;
+};
+
+
+/*
+ * Return a Big whose value is the value of this Big raised to the power n.
+ * If n is negative, round to a maximum of Big.DP decimal places using rounding
+ * mode Big.RM.
+ *
+ * n {number} Integer, -MAX_POWER to MAX_POWER inclusive.
+ */
+P.pow = function (n) {
+  var x = this,
+    one = new x.constructor(1),
+    y = one,
+    isneg = n < 0;
+
+  if (n !== ~~n || n < -MAX_POWER || n > MAX_POWER) throw Error(INVALID + 'exponent');
+  if (isneg) n = -n;
+
+  for (;;) {
+    if (n & 1) y = y.times(x);
+    n >>= 1;
+    if (!n) break;
+    x = x.times(x);
+  }
+
+  return isneg ? one.div(y) : y;
+};
+
+
+/*
+ * Return a new Big whose value is the value of this Big rounded using rounding mode rm
+ * to a maximum of dp decimal places, or, if dp is negative, to an integer which is a
+ * multiple of 10**-dp.
+ * If dp is not specified, round to 0 decimal places.
+ * If rm is not specified, use Big.RM.
+ *
+ * dp? {number} Integer, -MAX_DP to MAX_DP inclusive.
+ * rm? 0, 1, 2 or 3 (ROUND_DOWN, ROUND_HALF_UP, ROUND_HALF_EVEN, ROUND_UP)
+ */
+P.round = function (dp, rm) {
+  var Big = this.constructor;
+  if (dp === UNDEFINED) dp = 0;
+  else if (dp !== ~~dp || dp < -MAX_DP || dp > MAX_DP) throw Error(INVALID_DP);
+  return round(new Big(this), dp, rm === UNDEFINED ? Big.RM : rm);
+};
+
+
+/*
+ * Return a new Big whose value is the square root of the value of this Big, rounded, if
+ * necessary, to a maximum of Big.DP decimal places using rounding mode Big.RM.
+ */
+P.sqrt = function () {
+  var r, c, t,
+    x = this,
+    Big = x.constructor,
+    s = x.s,
+    e = x.e,
+    half = new Big(0.5);
+
+  // Zero?
+  if (!x.c[0]) return new Big(x);
+
+  // Negative?
+  if (s < 0) throw Error(NAME + 'No square root');
+
+  // Estimate.
+  s = Math.sqrt(x + '');
+
+  // Math.sqrt underflow/overflow?
+  // Re-estimate: pass x coefficient to Math.sqrt as integer, then adjust the result exponent.
+  if (s === 0 || s === 1 / 0) {
+    c = x.c.join('');
+    if (!(c.length + e & 1)) c += '0';
+    s = Math.sqrt(c);
+    e = ((e + 1) / 2 | 0) - (e < 0 || e & 1);
+    r = new Big((s == 1 / 0 ? '1e' : (s = s.toExponential()).slice(0, s.indexOf('e') + 1)) + e);
+  } else {
+    r = new Big(s);
+  }
+
+  e = r.e + (Big.DP += 4);
+
+  // Newton-Raphson iteration.
+  do {
+    t = r;
+    r = half.times(t.plus(x.div(t)));
+  } while (t.c.slice(0, e).join('') !== r.c.slice(0, e).join(''));
+
+  return round(r, Big.DP -= 4, Big.RM);
+};
+
+
+/*
+ * Return a new Big whose value is the value of this Big times the value of Big y.
+ */
+P.times = P.mul = function (y) {
+  var c,
+    x = this,
+    Big = x.constructor,
+    xc = x.c,
+    yc = (y = new Big(y)).c,
+    a = xc.length,
+    b = yc.length,
+    i = x.e,
+    j = y.e;
+
+  // Determine sign of result.
+  y.s = x.s == y.s ? 1 : -1;
+
+  // Return signed 0 if either 0.
+  if (!xc[0] || !yc[0]) return new Big(y.s * 0);
+
+  // Initialise exponent of result as x.e + y.e.
+  y.e = i + j;
+
+  // If array xc has fewer digits than yc, swap xc and yc, and lengths.
+  if (a < b) {
+    c = xc;
+    xc = yc;
+    yc = c;
+    j = a;
+    a = b;
+    b = j;
+  }
+
+  // Initialise coefficient array of result with zeros.
+  for (c = new Array(j = a + b); j--;) c[j] = 0;
+
+  // Multiply.
+
+  // i is initially xc.length.
+  for (i = b; i--;) {
+    b = 0;
+
+    // a is yc.length.
+    for (j = a + i; j > i;) {
+
+      // Current sum of products at this digit position, plus carry.
+      b = c[j] + yc[i] * xc[j - i - 1] + b;
+      c[j--] = b % 10;
+
+      // carry
+      b = b / 10 | 0;
+    }
+
+    c[j] = (c[j] + b) % 10;
+  }
+
+  // Increment result exponent if there is a final carry, otherwise remove leading zero.
+  if (b) ++y.e;
+  else c.shift();
+
+  // Remove trailing zeros.
+  for (i = c.length; !c[--i];) c.pop();
+  y.c = c;
+
+  return y;
+};
+
+
+/*
+ * Return a string representing the value of this Big in exponential notation to dp fixed decimal
+ * places and rounded using Big.RM.
+ *
+ * dp? {number} Integer, 0 to MAX_DP inclusive.
+ */
+P.toExponential = function (dp) {
+  return stringify(this, 1, dp, dp);
+};
+
+
+/*
+ * Return a string representing the value of this Big in normal notation to dp fixed decimal
+ * places and rounded using Big.RM.
+ *
+ * dp? {number} Integer, 0 to MAX_DP inclusive.
+ *
+ * (-0).toFixed(0) is '0', but (-0.1).toFixed(0) is '-0'.
+ * (-0).toFixed(1) is '0.0', but (-0.01).toFixed(1) is '-0.0'.
+ */
+P.toFixed = function (dp) {
+  return stringify(this, 2, dp, this.e + dp);
+};
+
+
+/*
+ * Return a string representing the value of this Big rounded to sd significant digits using
+ * Big.RM. Use exponential notation if sd is less than the number of digits necessary to represent
+ * the integer part of the value in normal notation.
+ *
+ * sd {number} Integer, 1 to MAX_DP inclusive.
+ */
+P.toPrecision = function (sd) {
+  return stringify(this, 3, sd, sd - 1);
+};
+
+
+/*
+ * Return a string representing the value of this Big.
+ * Return exponential notation if this Big has a positive exponent equal to or greater than
+ * Big.PE, or a negative exponent equal to or less than Big.NE.
+ * Omit the sign for negative zero.
+ */
+P.toString = function () {
+  return stringify(this);
+};
+
+
+/*
+ * Return a string representing the value of this Big.
+ * Return exponential notation if this Big has a positive exponent equal to or greater than
+ * Big.PE, or a negative exponent equal to or less than Big.NE.
+ * Include the sign for negative zero.
+ */
+P.valueOf = P.toJSON = function () {
+  return stringify(this, 4);
+};
+
+
+// Export
+
+
+export var Big = _Big_();
+
+export default Big;