#include <algorithm>
#include <iostream>
#include <vector>
#include <numeric>
#include <iomanip>
using namespace std;

int main() {
    cout << fixed << setprecision(12);
    int ps[] = {2, 3, 5, 7, 11, 13};
    int cs[] = {4, 6, 8, 9, 10, 12};
    int p, c; cin >> p >> c;
    double ep = accumulate(ps, ps + 6, 0.0) / 6.0;
    double ec = accumulate(cs, cs + 6, 0.0) / 6.0;
    double ans = 1.0;
    while (p--) ans *= ep;
    while (c--) ans *= ec;
    cout << ans << endl;
    return 0;
}