#!/usr/bin/env python3
import math
r = float(input())
R = float(input())
t = 2 * math.pi - 2 * math.asin(r / R)
a0 = math.pi * (R + r) ** 2 - math.pi * (R - r) ** 2
a = a0 * (t / (2 * math.pi)) + math.pi * r ** 2
print(t)
print(a)