What is the perimeter of a rectangle that is 3 meters long and 2 meters wide?
长方形长3米，宽2米，周长是多少．
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<result>10</result>