DigitalState / Formio

                yc = ( id = 17, y = new BigNumber( y, b ) ).c;

            // Either NaN, ±Infinity or ±0?

            if ( !xc || !yc || !xc[0] || !yc[0] ) {

                // Return NaN if either is NaN, or one is 0 and the other is Infinity.

                if ( !x.s || !y.s || xc && !xc[0] && !yc || yc && !yc[0] && !xc ) {

                    y.c = y.e = y.s = null;

                } else {

                    y.s *= x.s;

                    // Return ±Infinity if either is ±Infinity.

                    if ( !xc || !yc ) {

                        y.c = y.e = null;

                    // Return ±0 if either is ±0.

                    } else {

                        y.c = [0];

                        y.e = 0;

                    }

                }

                return y;

            }

            e = bitFloor( x.e / LOG_BASE ) + bitFloor( y.e / LOG_BASE );

            y.s *= x.s;

                    yc = y.c;

                // Either NaN, Infinity or 0?

                if ( !xc || !xc[0] || !yc || !yc[0] ) {

                    return new BigNumber(

                      // Return NaN if either NaN, or both Infinity or 0.

                      !x.s || !y.s || ( xc ? yc && xc[0] == yc[0] : !yc ) ? NaN :

                        // Return ±0 if x is ±0 or y is ±Infinity, or return ±Infinity as y is ±0.

                        xc && xc[0] == 0 || !yc ? s * 0 : s / 0

                    );

                }

                q = new BigNumber(s);

                qc = q.c = [];