#include<bits/stdc++.h>
using namespace std;
long long a,b,n;
int main(){
	cin >> a >> b >> n;
	cout << a/b;
	cout << "."
	for(int i = 1; i <= n; i++)
	{
		a = a%b*10;
		cout << a/b;
	}
	return 0;
}

/**************************************************************
	Problem: 1271
	User: yangwanning
	Language: C++
	Result: Compile Error
****************************************************************/