#include <iostream>
using namespace std;
 
int main(){
    int a,b,k,n,i;
    cin>>a>>b>>n;
    cout<<a/b<<'.';
    k=a%b;
    for(i=0;i<n;i++){
        k=k*10;
        cout<<k/b;
        k=k%b;
    }
}

/**************************************************************
	Problem: 1271
	User: admin
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/