Xiao Ming reads a 128-page book, has read 80 pages, and finishes reading the remaining 4 days. How many pages per day are the remaining pages read on average?
小明读一本128页的书，已经读了80页，剩下的4天内读完，剩下的平均每天读多少页？
<gadget id="calculator">128 - 80</gadget>
<output>48</output>

<gadget id="calculator">48 / 4</gadget>
<output>12</output>

<result>12</result>