A rectangular vegetable field is 8 meters long and 2 meters less wide than its length. What is its perimeter in meters?
一块长方形菜地，长8米，宽比长少2米，它的周长是多少米？
<gadget id="calculator">8 - 2</gadget>
<output>6</output>

<gadget id="calculator">6 + 8</gadget>
<output>14</output>

<gadget id="calculator">14 * 2</gadget>
<output>28</output>

<result>28</result>