#include <bits/stdc++.h>

using namespace std;

const double PI = 3.141593;

int main() {
	double r = 5;
	double C = 2 * r * PI;
	double S = PI * pow(r, 2);
	double V = (4 / 3) * PI * pow(r, 3);
	cout << C << endl;
	cout << S << endl;
	cout << V << endl;
	
	return 0;
}