#include <bits/stdc++.h>

using namespace std;

constexpr double PI = 3.14159265358979;

int main() {
    double r, R;
    cin >> r >> R;
    cout << fixed << setprecision(15);
    double rad = 2 * PI - 2 * asin(r / R);
    cout << rad << endl;
    cout << 4 * PI * R * r * rad / (2 * PI) + PI * r * r << endl;
    return 0;
}