from math import *

r = float(input())
R = float(input())
C = (2 * R ** 2 - 4 * r ** 2)/(2 * R ** 2)
t = 2 * pi - acos(C)
S = pi * r ** 2 + pi * ((R + r) ** 2 - (R - r) ** 2) * (t/(2*pi))
print(t)
print(S)