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

	return 0;
}

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