123x321 is easy, 987x789 is hard for this method.
所有跟帖:
• 哈哈哈哈, 987x789 is easy only for calculator -500miles- ♂ (0 bytes) () 05/02/2010 postreply 05:17:10
• 那不成了五線譜了。 -xia19878- ♂ (0 bytes) () 05/02/2010 postreply 06:55:29
• 987x789? Easy! 123456789*987654321, a bit more challenging. -diaozhi- ♀ (0 bytes) () 05/02/2010 postreply 15:26:49