#include <bits/stdc++.h>
using namespace std;

int main() {
    int c[] = {4,6,8,9,10,12};
    int p[] = {2,3,5,7,11,13};
    
    long double nc = 0, np = 0;
    for (int i = 0; i < 6; i++) nc += 1.0 * c[i] / 6, np += 1.0 * p[i] / 6;
    
    int P, C; cin >> P >> C;
    cout << fixed << setprecision(11) << pow(np, P) * pow(nc, C) << endl;
}