If the width of a rectangle remains the same and the length increases by 6 meters, then its area increases by 54 square meters; if the length remains the same but the width decreases by 3 meters, then its area decreases by 48 square meters. What is the original area of the rectangle in square meters? ?
一个长方形，如果宽不变，长增加6米，那么它的面积增加54平方米；如果长不变，宽减少3米，那么它的面积减少48平方米，这个长方形原来的面积是多少平方米？
<gadget id="calculator">48 / 3</gadget>
<output>16</output>

<gadget id="calculator">54 / 6</gadget>
<output>9</output>

<gadget id="calculator">16 * 9</gadget>
<output>144</output>

<result>144</result>