#include<bits/stdc++.h>//1.59016393442622950819672131147540983606557377049180
using namespace std;//   1.59016393442622950819672131147540983606557377049180
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:15 ms
	Memory:2072 kb
****************************************************************/