#include <bits/stdc++.h>
using namespace std;
constexpr long double PI = 3.1415926535897932384626433;

int main() {
	double r,R;
    cin >> r >> R;
	double c = (R*R+R*R-4*r*r)/(2*R*R);
	double t = 2*PI-acos(c);
	double theta = t*180./PI;
	double area = PI*((R+r)*(R+r)-(R-r)*(R-r))*theta/360. + PI*r*r;
	printf("%.10f\n",t);
	printf("%.10f\n",area);
}