#include<bits/stdc++.h>
using namespace std;
string s1,s2;
int a,b,c;

int main()
{
    cin >> a >>b >>c;
    cout << a/b<<'.';
    int t = a % b;
    for(int i = 0;i<c;i++)
    {
        t *= 10;
         cout << t / b;
        t = t % b;
    }
   
    return 0;
}
/**************************************************************
	Problem: 1271
	User: mariooo
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/