If the upper and lower bases of a trapezoid are doubled, and the height remains the same, how many times will the area of the trapezoid be enlarged?
把一个梯形的上底和下底都扩大到原来的2倍，高不变，这个梯形的面积扩大到原来的多少倍
<gadget id="calculator">2 / 1</gadget>
<output>2</output>

<result>2</result>