#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;
    }
}
/**************************************************************
	Problem: 1271
	User: chenlingxuan
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2072 kb
****************************************************************/