There is a trapezoidal wheat field, the upper base is 100 meters, the lower base is 120 meters, and the height is 60 meters. If 6000 kilograms of wheat can be harvested per hectare, how many kilograms of wheat can be harvested in this wheat field?
有一块梯形麦田，它的上底是100米，下底是120米，高是60米．如果每公顷收小麦6000千克，这块麦田一共能收小麦多少千克？
<gadget id="calculator">100 + 120</gadget>
<output>220</output>

<gadget id="calculator">60 / 2 / 10_000</gadget>
<output>3/1_000 = around 0.003</output>

<gadget id="calculator">220 * (3/1_000) * 6_000</gadget>
<output>3_960</output>

<result>3_960</result>