using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
class TEST{
	static void Main(){
		Sol mySol =new Sol();
		mySol.Solve();
	}
}

class Sol{
	public void Solve(){
		int[] pd=new int[]{2,3,5,7,11,13};
		int[] cd=new int[]{4,6,8,9,10,12};
		
		double pm=pd.Sum()/6.0;
		double cm=cd.Sum()/6.0;
		double ans=1.0;
		for(int i=0;i<P;i++)ans*=pm;
		for(int i=0;i<C;i++)ans*=cm;
		Console.WriteLine(ans);
	}
	int P,C;
	public Sol(){
		var d=ria();
		P=d[0];C=d[1];
	}




	static String rs(){return Console.ReadLine();}
	static int ri(){return int.Parse(Console.ReadLine());}
	static long rl(){return long.Parse(Console.ReadLine());}
	static double rd(){return double.Parse(Console.ReadLine());}
	static String[] rsa(){return Console.ReadLine().Split(' ');}
	static int[] ria(){return Array.ConvertAll(Console.ReadLine().Split(' '),e=>int.Parse(e));}
	static long[] rla(){return Array.ConvertAll(Console.ReadLine().Split(' '),e=>long.Parse(e));}
	static double[] rda(){return Array.ConvertAll(Console.ReadLine().Split(' '),e=>double.Parse(e));}
}