#include <iostream>
#include <iomanip>
using namespace std;

const double P = (2 + 3 + 5 + 7 + 11 + 13) / 6.0;
const double C = (4 + 6 + 8 + 9 + 10 + 12) / 6.0;

int main() {
	int p, c;
	cin >> p >> c;
	double ans = 1.0;
	for(int i = 0; i < p; i++) {
		ans *= P;
	}
	for(int i = 0; i < c; i++) {
		ans *= C;
	}
	cout << setprecision(12) << ans << endl;
}