Three identical squares are put together to form a rectangle, and the perimeter is reduced by 48 decimeters. What is the area of the rectangle?
3个同样的正方形拼成一个长方形，周长减少了48分米，这个长方形的面积是多少？
<gadget id="calculator">48 / 4</gadget>
<output>12</output>

<gadget id="calculator">12 * 12 * 3</gadget>
<output>432</output>

<result>432</result>