#include <algorithm>
#include <climits>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <ctime>
#include <iostream>
#include <sstream>
#include <functional>
#include <map>
#include <string>
#include <cstring>
#include <vector>
#include <queue>
#include <stack>
#include <deque>
#include <set>
#include <list>
#include <numeric>
using namespace std;
const double PI = 3.14159265358979323846;
const double EPS = 1e-12;
const int INF = 1<<25;
typedef pair<int,int> P;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

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

int main(){
	int c, d;
	cin>>c>>d;
	ld r = 1.0;
	for(int i = 0; i < c; i++) r *= 41.0/6.0;
	for(int i = 0; i < d; i++) r *= 49.0/6.0;
	printf("%.99Lf\n", r);
	return 0;
}