这么说，最后的结果应该比正确结果小？

所有跟帖： 

• The second guy is wrong. We don’t care by how much he is wrong -九十酒妹- ♀ (0 bytes) () 12/10/2017 postreply 16:18:29

• The ninth Sister, the question is: why is he wrong? can say "we -金迷- ♂ (0 bytes) () 12/10/2017 postreply 16:24:51

• Counting必须有清楚（clear-cut）的步骤，然后应用乘法原理。 -九十酒妹- ♀ (173 bytes) () 12/10/2017 postreply 16:44:45

• 九妹果然数学大牛，看明天我儿子的学校讲不讲，还是需要给出公式说明为什么不对的. -金迷- ♂ (0 bytes) () 12/10/2017 postreply 17:48:04

• Amateurs only. -九十酒妹- ♀ (0 bytes) () 12/10/2017 postreply 18:18:38