Read a novel diligently, and read 400 pages in the first 8 days. According to this calculation, how many days will it take to finish reading this 900-page novel.
勤勤看一本小说，前8天看了400页．照这样计算，看完这本900页的小说一共需要多少天．
<gadget id="calculator">400 / 8</gadget>
<output>50</output>

<gadget id="calculator">900 / 50</gadget>
<output>18</output>

<result>18</result>