# 43.multiply-strings

## Statement

• Difficulty: Medium
• Tag: `数学` `字符串` `模拟`

``````输入: num1 = "2", num2 = "3"

``````输入: num1 = "123", num2 = "456"

• `1 <= num1.length, num2.length <= 200`
• `num1` 和 `num2` 只能由数字组成。
• `num1` 和 `num2` 都不包含任何前导零，除了数字0本身。

• Link: Multiply Strings
• Difficulty: Medium
• Tag: `Math` `String` `Simulation`

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.

## Solution

``````class Solution:
def multiply(self, num1: str, num2: str) -> str:
return str(int(num1) * int(num2))
``````