A * B离散运算算法，怎么采用C程序的语言代码的编写的步骤实现呢？

Question

Problem Description
Calculate A * B.

Input
Each line will contain two integers A and B. Process to end of file.

Note: the length of each integer will not exceed 50000.

Output
For each case, output A * B in one line.

Sample Input
1
2
1000
2

Sample Output
2
2000