There is a trapezoidal wheat field, the upper base is 60 meters, the lower base is 40 meters, and the height is 75 meters. What is the area of this wheat field in square meters?
有一块梯形麦田，上底是60米，下底是40米，高是75米，这块麦田的面积是多少平方米？
<gadget id="calculator">60 + 40</gadget>
<output>100</output>

<gadget id="calculator">75 / 2</gadget>
<output>75/2 = around 37.5</output>

<gadget id="calculator">100 * (75/2)</gadget>
<output>3_750</output>

<result>3_750</result>