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

### Instruction:
 苏拉亚比凯勒多摘了12个苹果，而凯勒比凯拉少摘了5个苹果。如果凯拉摘了20个苹果，苏拉亚比凯拉多摘了多少个苹果？


### Response:
 凯勒摘了20 - 5 = <<20-5=15>>15个苹果。
苏拉亚摘了12 + 15 = <<12+15=27>>27个苹果。
苏拉亚比凯拉多摘了27 - 20 = <<27-20=7>>7个苹果。