Xiao Ming reads a book with a total of 190 pages. He has already read 90 pages. He needs to finish reading the remaining pages within 5 days. How many pages do he read on average every day?
小明看一本书共190页，已经看了90页，剩下的页数要在5天内看完，平均每天看多少页？
<gadget id="calculator">190 - 90</gadget>
<output>100</output>

<gadget id="calculator">100 / 5</gadget>
<output>20</output>

<result>20</result>