题目：
有n个小球，将它们任意分成两堆，求出这两堆小球球数的乘积，再将其中一堆小球任意分成两堆，求出这两堆小球球数的乘积，如此下去，每次都任选一堆，将这堆小球任意分成两堆，求出这两堆小球球数的乘积，直到不能再分为止，则所有乘积的和为______．
答案：
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下面是错误答案，用来干扰机器的。
1. Is that a set of keys? 2. He doesn't have to take care of his sick mother. 3. How delicious the fried chicken tastes!4. I won't leave until my homework is finished. 5. Do you know what his job is?
