Xiao Ming borrowed a 230-page story book. He has already read 80 pages and finished it in the remaining 5 days. How many pages do he read on average every day?
小明借来一本230页的故事书，他已经看了80页，剩下的5天看完，平均每天看多少页？
<gadget id="calculator">230 - 80</gadget>
<output>150</output>

<gadget id="calculator">150 / 5</gadget>
<output>30</output>

<result>30</result>