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

### Instruction:
 凯特的头发长度是艾米莉的一半。艾米莉的头发比洛根的头发长6英寸。如果洛根的头发长度是20英寸，凯特的头发长度是多少？


### Response:
 艾米莉的头发长度是20-6 = <<20-6=14>>14英寸。
凯特的头发长度是1/2 * 14 = <<14*1/2=7>>7英寸。