Aihua factory needs to produce 16,500 exercise books. After 5 days, 7,500 copies have been produced. According to this production speed, how many days will it take to complete all these tasks?
爱华本厂要生产1.65万本练习本，5天后，已经生产了0.75万册，照这样的生产速度，全部完成这些任务共需几天？
<gadget id="calculator">0.75 / 5</gadget>
<output>0.15</output>

<gadget id="calculator">1.65 / 0.15</gadget>
<output>11</output>

<result>11</result>