import java.util.Scanner;

public class Main {
    public static final Scanner sc = new Scanner(System.in);

    public static void main(String[] args) {
        long n = sc.nextInt();
        long m = sc.nextInt();

        long firstNumber=1;
        long sum=0;
        for (long i = 0; i < n; i++) {
            for (int j = 0; j < m/2; j++) {
                sum+=firstNumber+j* 6L;
            }
            if(i%2==0) {
                firstNumber += 6;
            }
        }

        firstNumber=7;
        for (long i = 0; i < n-2; i++) {
            for (int j = 0; j < (m-2)/2; j++) {
                sum+=firstNumber+j* 6L;
            }
            if(i%2==0) {
                firstNumber += 6;
            }
        }
        System.out.println(sum);
    }
}