Xiao Li reads a 150-page book of fairy tales. She has read 30 pages, and she plans to read the rest in 5 days. How many pages per day on average?
小丽看一本150页的童话故事书．她已经看了30页，剩下的打算用5天看完，平均每天看多少页？
<gadget id="calculator">150 - 30</gadget>
<output>120</output>

<gadget id="calculator">120 / 5</gadget>
<output>24</output>

<result>24</result>