#include<bits/stdc++.h>
using namespace std;
int main(){
    double x,y=3.14159;
    cin>>x;
    cout<<fixed<<setprecision(4)<<x*2<<" ";
    cout<<fixed<<setprecision(4)<<2*x*y<<" ";
    cout<<fixed<<setprecision(4)<<y*y*x;
    return 0;
}