#include <iostream>
#include <iomanip>
#include <vector>

using ldouble = long double;

ldouble exp(const std::vector<ldouble>& dice, int turn) {
    if (turn == 0) return 1;

    ldouble ret = 0;
    for (auto x : dice) {
        ret += x * exp(dice, turn - 1) / 6;
    }
    return ret;
}

void solve() {
    int p, c;
    std::cin >> p >> c;

    auto ans = exp({2, 3, 5, 7, 11, 13}, p) *
               exp({4, 6, 8, 9, 10, 12}, c);
    std::cout << std::fixed << std::setprecision(10)
              << ans << std::endl;
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}