import math

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

a = math.asin(r / R)
t_prime = 2 * math.pi - 2 * a
area = 2 * R * r * t_prime + math.pi * (r ** 2)

print("{0:.10f}".format(t_prime))
print("{0:.10f}".format(area))