#include <algorithm>
#include <cstdio>
#include <cstdlib>
#include <cctype>
#include <cmath>
#include <iostream>
#include <queue>
#include <list>
#include <stack>
#include <map>
#include <numeric>
#include <set>
#include <sstream>
#include <string>
#include <vector>
using namespace std;
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it)
#define ALLOF(c) (c).begin(), (c).end()
typedef long long ll;

int main(){
  int P, C;
  cin >> P >> C;
  double kP = (2+3+5+7+11+13)/6.0;
  double kC = (4+6+8+9+10+12)/6.0;
  double ret = 1.0;
  rep(i,P) ret *= kP;
  rep(i,C) ret *= kC;
  printf("%.10lf\n", ret);
  return 0;
}