The upper base of a right-angled trapezoid is 6 decimeters. After increasing the upper base by 2 decimeters, it becomes a square. What is the area of the original trapezoid?
一个直角梯形上底为6分米，把上底增加2分米后，就变成了一个正方形，原梯形的面积为多少．
<gadget id="calculator">6 + 6 + 2</gadget>
<output>14</output>

<gadget id="calculator">6 + 2</gadget>
<output>8</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">14 * 4</gadget>
<output>56</output>

<result>56</result>