The lower base of a trapezoid is 24 decimeters, and the height is 8 decimeters. If the upper base increases (1/5), the area will increase by 16 decimeters squared and become a parallelogram. How many decimeters squared is the area of the original trapezoid?
一个梯形下底24分米，高8分米，如果上底增加(1/5)，面积就增加16平方分米，变成一个平行四边形，原梯形的面积是多少平方分米？
<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">16 * (1/4)</gadget>
<output>4</output>

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

<gadget id="calculator">4 / (1/5)</gadget>
<output>20</output>

<gadget id="calculator">24 + 20</gadget>
<output>44</output>

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

<gadget id="calculator">44 * 4</gadget>
<output>176</output>

<result>176</result>