let dice1 = [2,3,5,7,11,13]
let dice2 = [4,6,8,9,10,12]

let hei1 = dice1.reduce(0.0, { $0 + Double($1)}) / 6
let hei2 = dice2.reduce(0.0, { $0 + Double($1)}) / 6

let inpt = readLine()!.split(separator: " ").map{ Int($0)!}

var ans = 1.0
for _ in (0..<inpt[0]) {
    ans = ans * hei1
}
for _ in(0..<inpt[1]) {
    ans = ans * hei2
}

print(ans)