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

### Instruction:
 Chandler每周可以吃23个苹果，Lucy每周可以吃19个苹果。如果农民每月只送货一次，他们需要订购多少个苹果一个月？


### Response:
 Chandler和Lucy每周可以吃23 + 19 = <<23+19=42>>42个苹果。
因此，他们一个月需要订购42 x 4 = <<42*4=168>>168个苹果。