#include <numeric>
#include <queue>
#define REP(i,n) for(int i=0; i<(int)(n); i++)

#include <cstdio>
inline int getInt(){ int s; scanf("%d", &s); return s; }

#include <set>

using namespace std;

int main(){
  const int p = getInt();
  const int c = getInt();
  const int a[] = {2, 3, 5, 7, 11, 13};
  const int b[] = {4, 6, 8, 9, 10, 12};
  double ans = 1;

  REP(i,p) ans *= accumulate(a, a + 6, 0.0) / 6.0;
  REP(i,c) ans *= accumulate(b, b + 6, 0.0) / 6.0;
  printf("%.15f\n", ans);
  return 0;
}