P, C = map(int, raw_input().split())
ep = sum([2,3,5,7,11,13])/6.0
ec = sum([4,6,8,9,10,12])/6.0
ans = 1.0
for i in range(P):
    ans *= ep
for i in range(C):
    ans *= ec
print('%.10f' % ans)