There is a seeder with a working width of 3 meters, calculated at 5 kilometers per hour, and working 12 hours a day, how many hectares can be sown?
有一台播种机，作业宽度是3米，按每小时5千米计算，一天工作12小时，可以播种多少公顷？
<gadget id="calculator">3 / 10_000</gadget>
<output>3/10_000 = around 0.0003</output>

<gadget id="calculator">5 * 1_000 * 12 * (3/10_000)</gadget>
<output>18</output>

<result>18</result>