#include <bits/stdc++.h>

using namespace std;

#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()

template<typename A, typename B> inline bool chmax(A &a, B b) { if (a<b) { a=b; return 1; } return 0; }
template<typename A, typename B> inline bool chmin(A &a, B b) { if (a>b) { a=b; return 1; } return 0; }

typedef unsigned long long ull;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<int, pii> P;

const ll INF = 1ll<<60;
const ll MOD = 1000000007;
const double EPS  = 1e-10;

int main() {
	int p, c;
	cin >> p >> c;
	
	int val[2][6] = {{2,3,5,7,11,13},{4,6,8,9,10,12}};
	int sum[2] = {};
	
	REP(i, 2) REP(j, 6) sum[i] += val[i][j];
	
	double ans = 1.0, now;
	now = 1;
	REP(i, p) now *= (double)sum[0] / 6;
	ans *= now;
	
	now = 1;
	REP(i, c) now *= (double)sum[1] / 6;
	ans *= now;
	
	printf("%.15f\n", ans);
	
	return 0;
}