#include<iostream>
#include<cstdio>
using namespace std;
int main(){
    double ans;
    int P,C;
    long long product=1;
    cin >> P >> C;
    for(int i=0;i<P;i++) product *= 41;
    for(int i=0;i<C;i++) product *= 49;
    ans = product;
    for(int i=0;i<P+C;i++) ans /= 6.0;
    printf("%.10lf\n",ans);
    return 0;
}