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

### Instruction:
 赛维尔跑的距离是凯蒂的三倍，而凯蒂跑的距离是科尔的四倍。如果赛维尔跑了84英里，科尔跑了多少英里？


### Response:
 赛维尔跑的距离是凯蒂的三倍，所以凯蒂跑了84/3 = <<84/3=28>>28英里。
凯蒂跑的距离是科尔的四倍，所以科尔跑了28/4 = <<28/4=7>>7英里。