#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<<t/b;
  	t=t%b;
  }
    return 0;
}

/**************************************************************
	Problem: 1271
	User: duyahan
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/