A book has 100 pages in total. Xiao Ming has already read 55 pages, and he needs to finish the rest within 9 days. How many pages do he need to read on average every day?
一本书共100页，小明已经看了55页，剩下的要在9天内看完，平均每天要看多少页？
<gadget id="calculator">100 - 55</gadget>
<output>45</output>

<gadget id="calculator">45 / 9</gadget>
<output>5</output>

<result>5</result>