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

### Instruction:
 迈克尔决定上一些钢琴课。一节课的费用是30美元，持续1.5小时。他上18小时的课需要支付多少费用？


### Response:
 一节课持续1.5小时，所以18小时的课是18 / 1.5 = <<18/1.5=12>>12节课。
如果一节课费用是30美元，那么12节课的费用是12 * 30 = <<30*12=360>>360美元。