Use two identical squares to form a rectangle. Given that the perimeter of the assembled rectangle is 24 cm, what is the area of each square?
用两个完全一样的正方形拼成一个长方形．已知拼成的长方形的周长是24厘米，那么，每个正方形的面积是多少．
<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<result>16</result>