A story book has 197 pages, Xiaojun read 42 pages, and the rest will be read in 5 days, how many pages per day on average?
一本故事书有197页，小军看了42页，剩下的要在5天看完，平均每天看几页？
<gadget id="calculator">197 - 42</gadget>
<output>155</output>

<gadget id="calculator">155 / 5</gadget>
<output>31</output>

<result>31</result>