#include <stdio.h> int main() { int a,b,n,c; scanf("%d %d %d", &a, &b, &n); if (a > b) a = a % b; for (int i = 1; i <= n; i++) { c = 10 * a / b; a = 10 * a - b * c; } printf("%d\n", c); return 0;//最近总算学会用scanf和printf了 }