#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,m,b,c=0;
	cin>>n>>m>>b;
	cout<<n/m<<".";
	c=n%m;
	for(int i=1;i<=b;i++){
		c*=10;
		cout<<c/m;
		c=c%m;
	}
	return 0;
}

/**************************************************************
	Problem: 1271
	User: houshanglin
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2072 kb
****************************************************************/