There is a trapezoidal wheat field with an upper base of 28 meters, a lower base of 32 meters and a height of 20 meters. A total of 301.2 kilograms of wheat is harvested in this wheat field. How many kilograms of wheat are harvested on average per hectare?
有一块梯形麦田，上底28米，下底32米，高20米，在这块麦田里共收获小麦301.2千克，平均每公顷收小麦多少千克？
<gadget id="calculator">32 + 28</gadget>
<output>60</output>

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

<gadget id="calculator">60 * (1/1_000)</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">301.2 / (3/50)</gadget>
<output>5_020</output>

<result>5_020</result>