In an approximately parallelogram paddy field with a base of 150 meters and a height of 80 meters, a total of 9 tons of rice are harvested. How many tons of rice are harvested per hectare on average?
在一块底边是150米，高是80米的近似平行四边形的稻田里，共收稻谷9吨，平均每公顷收稻谷多少吨？
<gadget id="calculator">80 / 10_000</gadget>
<output>1/125 = around 0.008</output>

<gadget id="calculator">150 * (1/125)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">9 / (6/5)</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>