public class gf28mult {
    final static int m = 0x11b;
    static int mult28(int a, int b) {
	int ans = 0;

	while (a != 0) {
	    if ((a & 1) == 1) {
		ans = ans ^ b;
 	    }
	    b = b << 1;
	    if (b >= 0x100) {
		b = b ^ m;
	    }
	    a = a >> 1;
	}

	return ans;
    }

    public static void main(String argv[]) {
	System.out.printf("%02x\n", mult28(0x16, 0x64));
    }
}