The knitting factory wants to produce a batch of pure cotton underwear. It plans to produce 240 sets per day and complete the task in 12 days. It actually produces 288 sets per day. How many days did it actually take?
针织厂要生产一批纯棉内衣，计划每天生产240套，12天完成任务，实际每天生产288套，实际用了多少天？
<gadget id="calculator">12 / 288</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">240 * (1/24)</gadget>
<output>10</output>

<result>10</result>