The garment factory originally planned to process 360 sets of garments in 20 days. As a result, the task was completed 5 days ahead of schedule, how many more sets were actually processed per day than planned?
服装厂原计划20天加工360套服装．结果提前5天完成任务，实际平均每天比计划多加工多少套？
<gadget id="calculator">20 - 5</gadget>
<output>15</output>

<gadget id="calculator">360 / 15</gadget>
<output>24</output>

<gadget id="calculator">360 / 20</gadget>
<output>18</output>

<gadget id="calculator">24 - 18</gadget>
<output>6</output>

<result>6</result>