#include <iostream>
#include <iomanip>

using namespace std;

int main() {
    int p, c;
    cin >> p >> c;
    int prime = 2 + 3 + 5 + 7 + 11 + 13;
    int composite = 4 + 6 + 8 + 9 + 10 + 12;
    double ans = 1.0;
    for(int i=0;i<p;i++) ans *= prime;
    for(int i=0;i<c;i++) ans *= composite;
    for(int i=0;i<p+c;i++)
        ans /= 6;

    cout << fixed << setprecision(10) << ans << endl;
}