A rectangle is 12 meters wide and three times as long as it is wide. What is the area of this rectangle?
一个长方形宽12米，长是宽的3倍．这个长方形的面积是多少？
<gadget id="calculator">12 * 3</gadget>
<output>36</output>

<gadget id="calculator">36 * 12</gadget>
<output>432</output>

<result>432</result>