#include <iostream>

#include <string>

#include <sstream>

#include <cmath>

using namespace std;

int main()

{

int a, b, n;

while (cin >> a >> b >> n)

{

cout << a / b;

int dot = a % b;

cout << ".";

if (n >= 0)

{

for (int i = 0; i < n; i++)

{

dot = dot * 10;

cout << dot / b;

dot = dot % b;

}

}

cout << endl;

}

}