#include<bits/stdc++.h>
using namespace std;
long long 	a,	b,	n;
int main(){
   		 cin>>a>>b>>n;
   	 cout<<a/b;
   	 cout<<".";
   for(int i=1;i<=n;i++){
      	  a=a%b*10;
       	 cout<<a/b;
         
    }
}
 
/**************************************************************
	Problem: 1271
	User: wuzhijing
	Language: C
	Result: Compile Error
****************************************************************/