#include <iostream>
using namespace std;

int main() {
    float a;
    cin >> a;

    float perimetar = 2 * a * 3.1415;
    float plostina = a * a * 3.1415;

    cout << "Perimetar e " << perimetar << ", a plostinata e " << plostina << endl;
    return 0;
}