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

### Instruction:
 一个停车场里有516辆汽车。其中三分之一是蓝色的，一半是红色的，剩下的是黑色的。停车场上有多少辆黑色汽车？


### Response:
 蓝色汽车 = 516 * (1/3) = <<516*(1/3)=172>>172辆
红色汽车 = 516 * (1/2) = <<516*(1/2)=258>>258辆
黑色汽车 = 516 - (172 + 258) = 86辆