If a parallelogram is trimmed and repaired, it becomes a square. The perimeter of the square is 24 centimeters. What is the area of the parallelogram in square centimeters?
一个平行四边形割补后是个正方形，正方形的周长是24厘米，则这个平行四边形的面积是多少平方厘米．
<gadget id="calculator">24 / 4</gadget>
<output>6</output>

<gadget id="calculator">6 * 6</gadget>
<output>36</output>

<result>36</result>