#C. A*B Problem

Type: RemoteJudge

1000ms

125MiB

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题目背景

高精度乘法模板题。

给出两个非负整数，求它们的乘积。

输入共两行，每行一个非负整数。

输出一个非负整数表示乘积。

1 
2

每个非负整数不超过 $10^{2000}$ 。