#include <iostream> #include <iomanip> using namespace std; int main() { double pi = 3.14159; double r; cin >> r; cout << fixed << setprecision(4) << 2*r << " "; cout << fixed << setprecision(4) << 2*pi*r << " "; cout << fixed << setprecision(4) << r*r*pi << endl; return 0; }