#include <bits/stdc++.h> using namespace std;

int main() { double a; cin >> a; cout << fixed << setprecision(4) << a * 2; cout << " "; cout << fixed << setprecision(4) << a * 3.14159 * 2; cout << " "; cout << fixed << setprecision(4) << a *a * 3.14159; return 0; }