Below is an instruction that describes a task. Write a response that appropriately completes the request in Chinese. Please answer in Chinese.

### Instruction:
 Jack说他的书包里比Gerald多13本笔记本。Jack给了Paula 5本笔记本和Mike 6本笔记本。如果Gerald有8本笔记本，Jack还剩下多少本笔记本？


### Response:
 Jack在给Paula 5本笔记本之前有8+13 = <<8+13=21>>21本笔记本。
然后他还剩下21-5 = <<21-5=16>>16本笔记本，在给Mike又给了6本笔记本之前。
然后他还剩下16-6 = <<16-6=10>>10本笔记本。