#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> VI;
#define REP(i, n) for(int(i)=0;(i)<(n);++(i))
#define in(T,V) T V;cin>>V;

int p[] = {2,3,5,7,11,13};
int c[] = {4,6,8,9,10,12};

int main(){
    in(int,P);
    in(int,C);
    double Ep = 0, Ec = 0;
    REP(i,6){
        Ep += p[i]/6.;
        Ec += c[i]/6.;
    }
    double res = 1;
    REP(i,P) res *= Ep;
    REP(i,C) res *= Ec;

    cout << setprecision(12) << res << endl;
}