#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;
}