A rectangular piece of land is 6 meters wide and three times as long as it is wide. How many square meters is this piece of land?
一块长方形地，宽是6米，长是宽的3倍，这块地有多少平方米？
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">18 * 6</gadget>
<output>108</output>

<result>108</result>