A parallelogram vegetable field has a base of 250 meters and a height of 120 meters. What is the area of the field in hectares?
一块平行四边形菜地，底是250米，高120米，这块地的面积是多少公顷？
<gadget id="calculator">250 * 120</gadget>
<output>30_000</output>

<gadget id="calculator">30_000 / 10_000</gadget>
<output>3</output>

<result>3</result>