A rectangular piece of land has a perimeter of 24 meters and its length is twice its width. What is the area of the land in square meters?
一块长方形的地，它的周长是24米，长是宽的2倍，这块地的面积是多少平方米？
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">24 / 2 / 3</gadget>
<output>4</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">4 * 8</gadget>
<output>32</output>

<result>32</result>