divide static method
除 a/b Divides first nullable number by second Returns zero if denominator is zero
Implementation
static Decimal divide(num? a, num? b) {
final den = _safeParseNum(b);
if (den == Decimal.zero) return Decimal.zero;
return (_safeParseNum(a) / den).toDecimal(scaleOnInfinitePrecision: 18);
}