For a rectangle, if the length is removed by 3cm or the width is removed by 2cm, the area will be reduced by 12cm**2. Find the area of the original rectangle.
一个长方形，长去掉3cm或宽去掉2cm，面积都减少12cm**2，求原来长方形的面积是多少．
<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">4 * 6</gadget>
<output>24</output>

<result>24</result>