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

### Instruction:
 有一个宽度为4英寸的矩形。如果矩形的周长为30英寸，矩形的面积是多少？


### Response:
 矩形的高度的两倍是30英寸 - 2 * 4英寸 = 22英寸。
矩形的高度是22英寸 / 2 = <<22/2=11>>11英寸。
矩形的面积是4英寸 * 11英寸 = <<4*11=44>>44平方英寸。