#include <bits/stdc++.h>
using namespace std;

int main() {
	const double pi = acos(-1);
	double r, R; cin >> r >> R;
	double a = r / sqrt(R * R - r * r);
	double theta = atan2(a, 1);
	double ans0 = 2 * (pi - theta);
	printf("%.10f\n", ans0);
	double s = (R + r) * (R + r) * (theta / 2);
	double s1 = r * r * pi / 2;
	double s2 = (R - r) * (R - r) * (theta / 2);
	double S = s - s1 - s2;
	double ans1 = (R + r) * (R + r) * pi - (R - r) * (R - r) * pi - 2 * S;
	printf("%.10f\n", ans1);
	return 0;
}