There is a trapezoidal wheat field with a total harvest of 15,000 kilograms of wheat. The upper base of this wheat field is 80 meters long, the lower base is 120 meters long, and the height is 100 meters. How many kilograms of wheat are produced per hectare?
有一块梯形麦田，共收小麦15000千克，这块麦田上底为80米，下底长为120米，高为100米．每公顷产小麦多少千克？
<gadget id="calculator">80 + 120</gadget>
<output>200</output>

<gadget id="calculator">100 / 2 / 10_000</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">200 * (1/200)</gadget>
<output>1</output>

<gadget id="calculator">15_000 / 1</gadget>
<output>15_000</output>

<result>15_000</result>