In a parallelogram field with a bottom of 250 meters and a height of 120 meters, a total of 27 tons of corn is harvested, how many tons of corn are harvested per hectare on average.
在一块底250米、高120米的平行四边形的地里，共收玉米27吨，平均每公顷收玉米多少吨．
<gadget id="calculator">120 / 10_000</gadget>
<output>3/250 = around 0.012</output>

<gadget id="calculator">250 * (3/250)</gadget>
<output>3</output>

<gadget id="calculator">27 / 3</gadget>
<output>9</output>

<result>9</result>