#include <cmath>
#include <iostream>
using namespace std;
const double pi = acos(-1.0);
int main() {
	double r, R;
	cin >> r >> R;
	double ang = asin(r / R);
	double t = 2 * pi - 2 * ang;
	double d = R - r;
	double area = ((R + d) * (R + d) - (R - d) * (R - d)) * t / 2 + d * d * pi;
	cout.precision(15);
	cout << t << endl;
	cout << area << endl;
	return 0;
}