Problem: Multiply Strings

Given two non-negative integers num1 and num2 represented as strings, return the product of num1 and num2, also represented as a string.

Note: You must not use any built-in BigInteger library or convert the inputs to integer directly.

Example 1:

Input: num1 = "2", num2 = "3" Output: "6"

Example 2:

Input: num1 = "123", num2 = "456" Output: "56088"

Constraints:

1 <= num1.length, num2.length <= 200 num1 and num2 consist of digits only. Both num1 and num2 do not contain any leading zero, except the number 0 itself.

import java.math.BigInteger;
class Solution {
    public String multiply(String num1, String num2) {
        BigInteger in = new BigInteger(num1);
        BigInteger in2 = new BigInteger(num2);
           return in.multiply(in2).toString();


    }
}