Xiao Ming reads a 600-page story book, and reads 45 pages in 3 days. At this speed, how many days will it take to finish the book? (Solve with ratio)
小明读一本600页的故事书，3天读了45页，照这样的速度，还要几天才能读完这本书？(用比例解)
<gadget id="calculator">600 - 45</gadget>
<output>555</output>

<gadget id="calculator">3 * 555</gadget>
<output>1_665</output>

<gadget id="calculator">1_665 / 45</gadget>
<output>37</output>

<result>37</result>