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

### Instruction:
 Darlene的车每加仑可以行驶20英里。Martha的车每加仑行驶的英里数是Darlene的车的一半。Martha的车需要多少加仑才能完成300英里的行程？


### Response:
 Martha的车每加仑可以行驶20英里/2 = <<20/2=10>>10英里。
行程是300英里，所以Martha的车需要300英里/10英里/加仑 = <<300/10=30>>30加仑。