Lili read a 256 storybook, and she read 80 pages in the first 5 days. At this speed, how many days will it take to finish reading this storybook?
丽丽读一本256也得故事书，前5天读了80页，以这样的速度，读完这本故事书一共需要多少天？
<gadget id="calculator">80 / 5</gadget>
<output>16</output>

<gadget id="calculator">256 / 16</gadget>
<output>16</output>

<result>16</result>