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

### Instruction:
 四个轮胎和一个电池一共花了224美元。每个轮胎的价格是42美元。计算电池的价格。


### Response:
 四个轮胎的价格是42美元 x 4 = 168美元。
所以，电池的价格是224美元 - 168美元 = 56美元。