Problem E: Easy multiplication

Problem E: Easy multiplication

Time Limit: 1 Sec  Memory Limit: 128 MB
Submit: 574  Solved: 184
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Description

除了A + B以外最简单的代码就是 A * B了,但是A * B简不简单呢?

Input

测试数据有多组,对于每组测试数据:

输入两个正整数A , B (0 <= A , B<= 2^31)当A和B都为0的时候结束文本

Output

输出A * B的值

Sample Input Copy

1 2
3 4
0 0

Sample Output Copy

2
12