import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

from math import asin, pi

r, R = map(float, read().split())

theta = asin(r / R)

t = 2 * pi - 2 * theta

S = 2 * R * r * t
S += r * r * pi

print(t)
print(S)