(string1, string2)
| 195 | |
| 196 | @staticmethod |
| 197 | def string_mul(string1, string2): |
| 198 | if string1 is None or string2 is None: |
| 199 | return None |
| 200 | return str(Precise(string1).mul(Precise(string2))) |
| 201 | |
| 202 | @staticmethod |
| 203 | def string_div(string1, string2, precision=18): |