## Question

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.

## Python Solution

class Solution: def multiply(self, num1: str, num2: str) -> str: d = {'0':0, '1':1, '2':2, '3':3, '4':4, '5':5, '6':6, '7':7, '8':8, '9':9} n1=0 n2=0 for i in num1: n1 = n1*10 + d[i] for i in num2: n2 = n2*10 + d[i] return str(n1*n2)