Five identical small squares are put together to form a rectangle, and the perimeter is reduced by 24 cm. What is the area of each small square in square centimeters?
五个相同的小正方形拼成一个长方形，周长减少24厘米，每个小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>