main = interact $ unlines . map show . solve . map read . words

solve [r, e] = [t, s]
    where
        z = sqrt $ (e ** 2) - (r ** 2)
        t = 2 * pi - 2 * atan (r / z)
        w = pi * ((e + r) ** 2 - (e - r) ** 2)
        s = w * t / (2 * pi) + pi * r ** 2