import java.util.*;
import java.io.*;
import java.math.*;

public class No212 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int p = sc.nextInt(), c = sc.nextInt();
		System.out.println(Math.pow(41.0/6.0, p) * Math.pow(49.0/6.0, c));
	}
}