import java.util.Scanner;

public class No212 {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		
		int p = s.nextInt();
		int c = s.nextInt();
		
		double a = 41 / 6.0;
		double b = 49 / 6.0;
		
		System.out.println(Math.pow(a, p) * Math.pow(b, c));
	}

}