#include <bits/stdc++.h>
using namespace std;
int main() {
	const double PI = 3.14159;
	double r;
	cin >> r;
	cout << fixed << setprecision(4)
	<< 2 * r << " " << 2 * PI * r << " "
	<< PI * r * r << endl;
	return 0;
}