The area of a trapezoid is 60 square centimeters. If its upper and lower bases are doubled and its height is four times its original size, what is its area?
一个梯形的面积是60平方厘米，如果它的上底和下底都扩大到原来的2倍，高扩大到原来的4倍，则它的面积是多少平方厘米？
<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<gadget id="calculator">60 * 8</gadget>
<output>480</output>

<result>480</result>