#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=0;i<n;i++){
		a=a%b*10;
		cout<<a/b;
	}
	
    return 0;
}

/**************************************************************
	Problem: 1271
	User: linzihang
	Language: C
	Result: Compile Error
****************************************************************/