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

### Instruction:
 如果我们假设停车场里的所有30辆四轮驱动汽车都带有备胎，那么停车场里有多少个轮胎？


### Response:
 每辆汽车有4个轮胎 + 1个备胎 = <<4+1=5>>5个轮胎
如果停车场里有30辆汽车，每辆汽车有5个轮胎，那么总共的轮胎数是30 * 5 = <<30*5=150>>150个轮胎。