#include<bits/stdc++.h>
using namespace std;
int a,b,n,m;
int main(){
	cin >> a >> b >> n; 
	cout << a / b <<".";
	m = a % b;
	for(int i = 1; i <= n; i++){
		m = m * 10;
		cout << m / b;
		m = m % b;
	}

	return 0;
}

/**************************************************************
	Problem: 1271
	User: hongjiaming
	Language: C++
	Result: Accepted
	Time:18 ms
	Memory:2072 kb
****************************************************************/