There is a wheat field in the shape of a parallelogram with a base of 250 meters and a height of 84 meters. A total of 14.7 tons of wheat is harvested. What is the average number of tons of wheat harvested per hectare?
有一块麦田的形状是平行四边形，它的底是250米，高是84米，共收小麦14.7吨，平均每公顷收麦多少吨．
<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>