import math

r = float(input())
R = float(input())
theta = 2 * math.atan2(r, (R * R - r * r) ** 0.5)
print(2 * math.pi - theta)
ans = math.pi * ((R + r) ** 2 - (R - r) ** 2) / (2 * math.pi)
ans *= 2 * math.pi - theta
ans += math.pi * r * r
print(ans)