The wing of the aircraft model made by a scientific and technological team is composed of two identical trapezoids, the upper base is 35 mm, the lower base is 80 mm, and the height is 200 mm. What is its area?
一科技小组制作的飞机模型的机翼，是由两个完全相同的梯形组成的，上底是35毫米，下底是80毫米，高200毫米．它的面积是多少？
<gadget id="calculator">35 + 80</gadget>
<output>115</output>

<gadget id="calculator">200 / 2</gadget>
<output>100</output>

<gadget id="calculator">115 * 100 * 2</gadget>
<output>23_000</output>

<result>23_000</result>