import math

r = float(input())
R = float(input())

t = 2 * math.asin(r / R)
S = (math.pi * (R+r) ** 2 - math.pi * (R-r) ** 2)
S -= (math.pi * (R+r) ** 2 - math.pi * (R-r) ** 2) * (t / (math.pi * 2)) - math.pi * r ** 2

print(2*math.pi - t)
print(S)