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