#include <iostream>
#include <cmath>
using namespace std;

int main() {
	int a, w, q, b;
	cin >> a >> w >> q;
	for (int i = 1; i <= q; i++) {
		a *= 10;
		b = a / w;
		a = a % w;
	}
	cout << b;
	return 0;
}