Given two non-negative integers, str1 and str2, represented as strings, return the product of these integers, result, which is also represented as strings.
Constraints:
str1 and str2 consist of digits only.str1.length, str2.length str1 or str2Given two non-negative integers, str1 and str2, represented as strings, return the product of these integers, result, which is also represented as strings.
Constraints:
str1 and str2 consist of digits only.str1.length, str2.length str1 or str2