#include <stdio.h>
#include <math.h>
constexpr double pi = acos(-1);
int main() {
	double r, R, theta;
	scanf("%lf%lf", &r, &R);
	theta = 2 * pi - 2 * asin(r / R);
	printf("%.20lf\n", theta);
	printf("%.20lf\n", 2 * R * r * theta + pi * r * r);
}