A parallelogram vegetable field has a base of 320 meters and a height of 250 meters. How many hectares is this vegetable field?
一块平行四边形菜地，底320米，高250米．这块菜地的面积是多少公顷？
<gadget id="calculator">1 * 10_000</gadget>
<output>10_000</output>

<gadget id="calculator">250 / 10_000</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">320 * (1/40)</gadget>
<output>8</output>

<result>8</result>