# yukicoder No.212 素数サイコロと合成数サイコロ (2)

prime_dice = [2, 3, 5, 7, 11, 13]
comp_dice = [4, 6, 8, 9, 10, 12]

ev_p = sum(prime_dice) / 6
ev_c = sum(comp_dice) / 6

P, C = map(int, input().split())

# 独立な確率変数の積の期待値はそれぞれの期待値の積に等しくなる
print((ev_p ** P) * (ev_c ** C))