A similar parallelogram-shaped vegetable field has a base of 600 meters and a height twice the base. A total of 1080 tons of cabbage is harvested in one year. How many tons of cabbage are harvested per hectare on average?
一块近似的平行四边形菜地，底是600米，高是底的2倍，一年共收获1080吨白菜，平均每公顷收多少吨白菜？
<gadget id="calculator">600 * 2</gadget>
<output>1_200</output>

<gadget id="calculator">1 * 10_000</gadget>
<output>10_000</output>

<gadget id="calculator">1_200 / 10_000</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">600 * (3/25)</gadget>
<output>72</output>

<gadget id="calculator">1_080 / 72</gadget>
<output>15</output>

<result>15</result>