For a rectangle, if the length increases by 2 meters, the area increases by 12 square meters; if the width increases by 1 meter, the area increases by 8 square meters. Find the area of the original rectangle?
一个长方形，若长增加2米，则面积增加12平方米；若宽增加1米，则面积增加8平方米．求原长方形面积？
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">8 / 1</gadget>
<output>8</output>

<gadget id="calculator">6 * 8</gadget>
<output>48</output>

<result>48</result>