#include<stdio.h>
int main()
{
    int n,m,i,t,x;
    int  s;
    while(scanf("%d%d",&n,&m)!=EOF)
    {    s=1;
        while(m--)
        {
            s=s*10;
            t=s/n;
            s=s%n;
        }
        printf("%d\n",t%10);
    }
    return 0;
}