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

### Instruction:
 二十年前，谢恩比加勒特现在大两倍。如果加勒特现在12岁，那么谢恩现在多大？


### Response:
 二十年前，谢恩24岁。
谢恩现在是24 + 20 = <<24+20=44>>44岁。