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

### Instruction:
 史蒂夫有25只袜子。他有4双配对的袜子，其他都不配对。史蒂夫一共有多少只不配对的袜子？


### Response:
 每双袜子有2/1 = <<2/1=2>>2只袜子。
史蒂夫有2 * 4 = <<2*4=8>>8只配对的袜子。
史蒂夫有25 - 8 = <<25-8=17>>17只不配对的袜子。