A story book has 180 pages, Xiaoxiao has already read 140 pages, and finished it in the remaining 5 days, how many pages do you read on average every day?
一本故事书180页，笑笑已经看了140页，剩下的5天内看完，平均每天要看多少页？
<gadget id="calculator">180 - 140</gadget>
<output>40</output>

<gadget id="calculator">40 / 5</gadget>
<output>8</output>

<result>8</result>