#include <bits/stdc++.h>
using namespace std;

//高精度除法小数点位数
int main() {
    int n, m, p;
    cin >> n >> m >> p;

    for (int i = 0; i <= p; i++) {
        int r = n % m;
        int shang = n / m;
        printf("%d", shang);
        if (i == 0) printf(".");
        n = r * 10;
    }
    return 0;
}