A piece of grass is 8 meters wide and 3 meters less than its length. What is the perimeter of the grass in meters?
一块草地，宽8米，比长少3米，这个草地的周长是多少米？
<gadget id="calculator">8 + 3 + 8</gadget>
<output>19</output>

<gadget id="calculator">19 * 2</gadget>
<output>38</output>

<result>38</result>