A classroom is 8 meters long and 6 meters wide, what is the perimeter of the classroom in meters?
一个教室长8米，宽6米，这个教室的周长是多少米？
<gadget id="calculator">8 + 6</gadget>
<output>14</output>

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

<result>28</result>