#include<bits/stdc++.h>
using namespace std;
int main(){
   int a,b,n,p;
   cin>>a>>b>>n;
   cout<<a/b<<".";
   p=a%b;
   for(int i=1;i<=n;i++){
   	p=p*10;
   	cout<<p/b;
   	p=p%b;
   }
}
/**************************************************************
	Problem: 1271
	User: zhangailin
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/