The toy factory wants to produce 480 toys. It has been produced for 3 days and 90 toys have been completed. According to this calculation, how many days will it take to complete this batch of toys? (Column comprehensive formula solution)
玩具厂要生产480只玩具，已经生产了3天，完成了90只．照这样计算，完成这批玩具还要多少天？(列综合算式解答)
<gadget id="calculator">480 - 90</gadget>
<output>390</output>

<gadget id="calculator">90 / 3</gadget>
<output>30</output>

<gadget id="calculator">390 / 30</gadget>
<output>13</output>

<result>13</result>