P,C = map(int,raw_input().split(" "))

dice1 = [2,3,5,7,11,13]
dice2 = [4,6,8,9,10,12]
"""
def calc(dice,n):
    def nyrn(i):
        if i==0:
            return [1]
        else:
            r = nyrn(i-1)
            ret = []
            for rr in r:
                for d in dice:
                    ret.append(rr * d/6.0)
            return ret
    return nyrn(n)
"""
ca = sum(dice1)**P / float(6**P)
cb = sum(dice2)**C / float(6**C)
"""
ans = 0
for a in ca:
    for b in cb:
        ans += a*b
"""
print ca*cb