Three squares of the same size are put together to form a rectangle, and the sum of the perimeters is reduced by 12dm. What is the area of the rectangle in cm**2.
三个一样大小的正方形拼成一个长方形，周长的和减少12dm，这个长方形的面积是多少cm**2．
<gadget id="calculator">12 / 4</gadget>
<output>3</output>

<gadget id="calculator">3 * 3 * 3 * 100</gadget>
<output>2_700</output>

<result>2_700</result>