piece of parallelogram land has a base length of 250m and a height of 84m. Wheat is planted in this land, and a total of 14.7 tons of wheat are harvested. How many tons of wheat are harvested per hectare on average?
一块平行四边形的地，底边长250m，高84m，在这块地里种小麦，共收小麦14.7吨，平均每公顷收小麦多少吨？
<gadget id="calculator">84 / 10_000</gadget>
<output>21/2_500 = around 0.0084</output>

<gadget id="calculator">250 * (21/2_500)</gadget>
<output>21/10 = around 2.1</output>

<gadget id="calculator">14.7 / (21/10)</gadget>
<output>7</output>

<result>7</result>