Xiaohua borrowed a copy of "Exploring the Seabed", which has 150 pages. Xiaohua has already read 60 pages, and plans to finish the rest in 5 days. How many pages do she need to read on average every day?
小华借来一本《海底探秘》，这本书共150页．小华已经看了60页，剩下的打算用5天看完，平均每天要看多少页？
<gadget id="calculator">150 - 60</gadget>
<output>90</output>

<gadget id="calculator">90 / 5</gadget>
<output>18</output>

<result>18</result>