from math import *
import sys

sys.setrecursionlimit(10 ** 6)
int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def MI(): return map(int, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]

def main():
    sr = float(input())
    br = float(input())
    t=2*(pi-asin(sr/br))
    print(t)
    print(2*sr*br*t+sr*sr*pi)
main()