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

### Instruction:
 约翰每50分钟上一次厕所。在一部2.5小时的电影中，他会上几次厕所？


### Response:
 电影持续2.5*60=<<2.5*60=150>>150分钟
所以他会上厕所150/50=<<150/50=3>>3次