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

### Instruction:
 哈维开始有25块牛排。然后他卖了一些，只剩下12块牛排。他又卖了4块牛排，每块10美元。他总共卖了多少块牛排？


### Response:
 哈维一开始卖了25-12 = <<25-12=13>>13块牛排。
哈维总共卖了13+4 = <<13+4=17>>17块牛排。