#include <bits/stdc++.h>
#include<iostream>
#include<iomanip>
#include<string>
#include<algorithm>
#include<vector>
#include<set>
#include<list>
#include<queue>
#include<math.h>
#include<bitset>
using ll = long long;
using namespace std;

int main(){
    ll p, c;
    double ans = 1;
    cin >> p >> c;
    for (int i = 0; i < p; i++) ans *= 41;
    for (int i = 0; i < c; i++) ans *= 49;
    for (int i = 0; i < p + c; i++) ans /= 6;
    cout << fixed << setprecision(10) << ans << endl;
}