The upper base of a trapezoidal land is 230 meters, the lower base is 170 meters, the height is 150 meters, and the total yield of wheat is 22500 kg. How many kilograms of wheat are produced on average per hectare?
一块梯形地的上底是230米，下底是170米，高150米，共产小麦22500千克．平均每公顷产多少千克小麦？
<gadget id="calculator">230 + 170</gadget>
<output>400</output>

<gadget id="calculator">150 / 2 / 10_000</gadget>
<output>3/400 = around 0.0075</output>

<gadget id="calculator">400 * (3/400)</gadget>
<output>3</output>

<gadget id="calculator">22_500 / 3</gadget>
<output>7_500</output>

<result>7_500</result>