3 squares of the same size are used to form a rectangle with a perimeter of 24 cm. What is the area of one of the squares in square centimeters?
用3个大小完全相同的正方形拼成一个周长是24厘米的长方形，其中一个正方形的面积是多少平方厘米．
<gadget id="calculator">24 / 8</gadget>
<output>3</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>