A rectangular sports basketball court, the width is 20 meters less than the length, and the width is 40 meters, what is the perimeter of the basketball court in meters?
一个长方形运动篮球场，宽比长少20米，宽是40米，这个篮球场的周长是多少米？
<gadget id="calculator">40 + 20</gadget>
<output>60</output>

<gadget id="calculator">60 + 40</gadget>
<output>100</output>

<gadget id="calculator">100 * 2</gadget>
<output>200</output>

<result>200</result>