The area of a trapezoid is 8cm**2, if its upper base, lower base and height are doubled, what is its area in cm**2?
一个梯形的面积是8cm**2，如果它的上底、下底和高各扩大到原来的2倍，它的面积是多少cm**2．
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<result>32</result>