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

### Instruction:
 阿玛莉亚可以在2分钟内读完她的书的4页。她要读完18页的书需要多少分钟？


### Response:
 将页数除以每分钟读的页数：18页 / 4页/分钟 = <<18/4=4.5>>4.5分钟