For a trapezoid, if the upper base is extended by 10 decimeters, the area will increase by 40 decimeters squared and become a parallelogram. If the upper base of the original trapezoid is 6 decimeters, what is the area of the original trapezoid? (Please simply draw the graph)
一个梯形，如果上底延长10分米，面积就增加40平方分米，而且变成了一个平行四边形，如果原梯形的上底是6分米，那么原梯形的面积是多少平方分米？(请简单画出图形)
<gadget id="calculator">6 + 10 + 6</gadget>
<output>22</output>

<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">40 * (1/5)</gadget>
<output>8</output>

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

<gadget id="calculator">22 * 4</gadget>
<output>88</output>

<result>88</result>