#include <iostream>
#include <iomanip>
#include <cmath>

using ldouble = long double;
const ldouble PI = std::acos(-1L);

void solve() {
    ldouble r, R;
    std::cin >> r >> R;

    ldouble t = PI * 2 - std::acos(1 - (2 * r * r) / (R * R));
    ldouble area = ((R + r) * (R + r) - (R - r) * (R - r)) * PI * t / (PI * 2) +
                   r * r * PI;

    std::cout << std::fixed << std::setprecision(10)
              << t << std::endl
              << area << std::endl;
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}