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

### Instruction:
 约翰预订了一个酒店房间，每晚250美元，他有100美元的折扣。他需要支付多少钱？


### Response:
 费用是250*3=$<<250*3=750>>750
所以他需要支付750-100=$<<750-100=650>>650