A garment factory originally planned to make 480 sets of clothes in 15 days. Due to improved technology, it actually made 8 sets more than planned every day. How many days did it actually take to complete the task?
一个服装厂原计划15天做480套衣服，因改进技术，实际每天比计划多做8套，实际用了多少天完成了任务？
<gadget id="calculator">480 / 15</gadget>
<output>32</output>

<gadget id="calculator">32 + 8</gadget>
<output>40</output>

<gadget id="calculator">480 / 40</gadget>
<output>12</output>

<result>12</result>