循环跳跃数的一个输出问题的算法，怎么采用C语言的程序的方式来实现

Problem Description
Now give you two integers n m, you just tell me the m-th number after radix point in 1/n,for example n=4,the first numble after point is 2,the second is 5,and all 0 followed

Input
Each line of input will contain a pair of integers for n and m(1<=n<=10^7,1<=m<=10^5)

Output
For each line of input, your program should print a numble on a line,according to the above rules

Sample Input
4 2
5 7
123 123

Sample Output
5
0
8