A rectangular flower bed is 18 meters wide and twice as long as it is wide, what is its area in square meters?
一个长方形的花台的宽是18米，长是宽的2倍，它的面积是多少平方米？
<gadget id="calculator">18 * 2 * 18</gadget>
<output>648</output>

<result>648</result>