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

### Instruction:
 尼尔烤了20个饼干。他把其中2/5的饼干给了他的朋友。尼尔还剩下多少饼干？


### Response:
 给他的朋友的饼干数量是2/5 * 20个饼干 = <<2/5*20=8>>8个饼干。
剩下的饼干数量是20个饼干 - 8个饼干 = <<20-8=12>>12个饼干。