A book has 258 pages in total, Xiaogang has already read 142 pages, and the rest will take 2 days to finish, how many pages per day on average?
一本书共258页，小刚已经看了142页，余下的要2天看完，余下的平均每天看多少页？
<gadget id="calculator">258 - 142</gadget>
<output>116</output>

<gadget id="calculator">116 / 2</gadget>
<output>58</output>

<result>58</result>