A rectangular playground is 80 meters long and 20 meters longer than it is wide. What is the perimeter in meters?
一个长方形操场，长80米，长比宽多20米，周长是多少米？
<gadget id="calculator">80 - 20</gadget>
<output>60</output>

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

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

<result>280</result>