Xiaoli borrowed a 190-page story book and read 40 pages two days ago. She will finish the book within a week, how many pages will she read on average per day?
小丽借了一本190页的故事书，前2天看了40页．她要在一周内看完这本书，剩下的平均每天要看多少页？
<gadget id="calculator">190 - 40</gadget>
<output>150</output>

<gadget id="calculator">7 - 2</gadget>
<output>5</output>

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

<result>30</result>