The toy factory wants to produce intellectual toys and plans to produce 250 sets per day, which takes 12 days to complete; actually completes 300 sets per day, how many days is actually completed? (Solve with ratio)
玩具厂要生产智力玩具计划每天生产250套，12天完成；实际每天完成300套，实际多少天完成？(用比例解)
<gadget id="calculator">250 * 12</gadget>
<output>3_000</output>

<gadget id="calculator">3_000 / 300</gadget>
<output>10</output>

<result>10</result>