A book has 100 pages, 28 pages have been read, and the remaining 3 days are finished, how many pages should be read per day on average?
一本书100页，已经看了28页，剩下的3天看完，平均每天应看多少页？
<gadget id="calculator">100 - 28</gadget>
<output>72</output>

<gadget id="calculator">72 / 3</gadget>
<output>24</output>

<result>24</result>