The width of the school basketball court is 15 meters, and the length is twice the width, which is 2 meters less. How big is the basketball court?
学校篮球场的宽是15米，长是宽的2倍还少2米，这个篮球场有多大？
<gadget id="calculator">15 * 2</gadget>
<output>30</output>

<gadget id="calculator">30 - 2</gadget>
<output>28</output>

<gadget id="calculator">28 * 15</gadget>
<output>420</output>

<result>420</result>