There is a trapezoidal wheat field, the upper base is 280m, the lower base is 320m, and the height is 20m. A total of 3012 kilograms of wheat is harvested in this field. How many kilograms of wheat are harvested on average per hectare?
有一块梯形麦田，上底280m，下底320m，高20m．在这块田里共收小麦3012千克，平均每公顷收小麦多少千克？
<gadget id="calculator">280 + 320</gadget>
<output>600</output>

<gadget id="calculator">20 / 2 / 10_000</gadget>
<output>1/1_000 = around 0.001</output>

<gadget id="calculator">600 * (1/1_000)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">3_012 / (3/5)</gadget>
<output>5_020</output>

<result>5_020</result>