The perimeter of a rectangle is 48 meters, the length of the rectangle is twice the width, what is the area of the rectangle?
一个长方形的周长是48米，长方形的长是宽的2倍，长方形的面积是多少？
<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">48 / 2 / 3</gadget>
<output>8</output>

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<gadget id="calculator">16 * 8</gadget>
<output>128</output>

<result>128</result>