A parallelogram, cut along its height, can be assembled into a rectangle with a perimeter of 48 cm, and the length of this rectangle is three times its width. Find the area of this parallelogram.
一个平行四边形，沿着它的高剪开，可以拼成一个周长是48厘米的长方形，这个长方形的长是宽的3倍．求这个平行四边形的面积．
<gadget id="calculator">48 / 2</gadget>
<output>24</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">24 * (3/4)</gadget>
<output>18</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">24 * (1/4)</gadget>
<output>6</output>

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

<result>108</result>