A rectangular parking lot is 60 meters wide and 20 meters less than its length. What is its perimeter in meters?
一个长方形的停车场宽60米，比长少20米，它的周长是多少米
<gadget id="calculator">60 + 20</gadget>
<output>80</output>

<gadget id="calculator">80 + 60</gadget>
<output>140</output>

<gadget id="calculator">140 * 2</gadget>
<output>280</output>

<result>280</result>