#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(int i=1;i<=n;i++){
		t=t*10;
		cout<<t/b;
		t=t%b;
	}
	return 0;
}
/**************************************************************
	Problem: 1271
	User: wangsenlin
	Language: C++
	Result: Compile Error
****************************************************************/