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