The upper base of a trapezoid is 12 cm, and the lower base is 20 cm. If the upper base of the trapezoid is reduced to 6 cm, the area will be reduced by 24 square centimeters. What is the area of the original trapezoid in cm**2.
一个梯形的上底是12厘米，下底是20厘米，如果把这个梯形的上底减少到6cm，面积就减少24平方厘米，那么原梯形的面积是多少cm**2．
<gadget id="calculator">12 + 20</gadget>
<output>32</output>

<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">24 * (1/3)</gadget>
<output>8</output>

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

<gadget id="calculator">32 * 4</gadget>
<output>128</output>

<result>128</result>