A trapezoidal rice field has an upper base of 100 meters, a lower base of 60 meters, and a height of 30 meters. What is the area of the rice field in square meters?
一块梯形稻田，上底是100米，下底是60米，高30米，这块稻田的面积是多少平方米？
<gadget id="calculator">100 + 60</gadget>
<output>160</output>

<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">160 * 15</gadget>
<output>2_400</output>

<result>2_400</result>