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

### Instruction:
 乔纳森跑了7.5公里。梅赛德斯跑了两倍的距离，达文特比梅赛德斯多跑了2公里。梅赛德斯和达文特总共跑了多少公里？


### Response:
 梅赛德斯 = 2 * 7.5 = <<2*7.5=15>>15公里
达文特 = 15 + 2 = <<15+2=17>>17公里
15 + 17 = <<15+17=32>>32公里
梅赛德斯和达文特总共跑了32公里。