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

### Instruction:
 一页上有20张贴纸。如果你有12页贴纸但丢失了一页，那么你会有多少张贴纸？


### Response:
 丢失一页后，你还剩下12 - 1 = <<12-1=11>>11页贴纸。
如果每页上有20张贴纸，那么你会有11 x 20 = <<20*11=220>>220张贴纸。