#include<bits/stdc++.h>
using namespace std;
int main(){
    int s,b,i,n,g;
    cin>>s>>b>>n;
    cout<<s/b<<"."; 
    g=s%b;
    for(i=1;i<=n;i++){
        g=g*10;
        cout<<g/b;
        g=g%b;
    }
	return 0;
}
/**************************************************************
	Problem: 1271
	User: zzz
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2072 kb
****************************************************************/