If the length of a rectangle is increased by 6 cm and the width remains the same, then the area is increased by 24 cm2; if the width is decreased by 2 cm and the length remains the same, the area is reduced by 14 cm2. What is the area of the original rectangle?
一个长方形，如果长增加6厘米，宽不变，那么面积增加24平方厘米；如果宽减少2厘米，长不变，那么面积减少14平方厘米，原来这个长方形的面积是多少平方厘米．
<gadget id="calculator">14 / 2</gadget>
<output>7</output>

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

<gadget id="calculator">7 * 4</gadget>
<output>28</output>

<result>28</result>