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

### Instruction:
 Adah上周一共练习了7.5小时的大提琴。他在其中两天每天练习了86分钟。其他几天他一共练习了多少分钟？


### Response:
 Adah = 86 * 2 = 172分钟
7.5小时 = 450分钟
450 - 172 = <<450-172=278>>278分钟
Adah在其他几天一共练习了278分钟。