The garment factory needs to produce 1,500 sets of garments, and 40% of them were completed in the first 6 days. According to this calculation, how many days will it take to complete this batch of production tasks?
服装厂要生产1500套服装，前6天完成了40%，照这样计算，完成这批生产任务需多少天？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">6 / (2/5)</gadget>
<output>15</output>

<result>15</result>