A rectangle is 7 meters wide and 2 meters longer than it is wide. What is the circumference?
一个长方形，宽是7米，长比宽多2米．周长是多少？
<gadget id="calculator">7 + 2</gadget>
<output>9</output>

<gadget id="calculator">9 + 7</gadget>
<output>16</output>

<gadget id="calculator">16 * 2</gadget>
<output>32</output>

<result>32</result>