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

### Instruction:
 阿莉亚娜有一块被切成16片的披萨。她和她的朋友吃完后，还剩下4片。如果每个人吃了2片披萨，有多少人吃了这个披萨？


### Response:
 吃的人数是16 - 4 = <<16-4=12>>12个人
因为每个人吃了2片，所以有12/2 = 6个人吃了。