A rectangle, if the length remains the same, the width increases by 0.6 meters, the area increases by 8.4 square meters; if the width remains the same, the length decreases by 0.7 meters, the area decreases by 6.3 square meters. What was the original area of the rectangle?
一个长方形，如果长不变，宽增加0.6米，面积就增加8.4平方米；如果宽不变，长减少0.7米，面积就减少6.3平方米．这个长方形原来的面积是多少？
<gadget id="calculator">8.4 / 0.6</gadget>
<output>14</output>

<gadget id="calculator">6.3 / 0.7</gadget>
<output>9</output>

<gadget id="calculator">14 * 9</gadget>
<output>126</output>

<result>126</result>