A book with 240 pages, I have been reading it for 5 days, and there are 120 pages left, how many pages are I reading on average every day?
一本书240页，明明已看5天，还剩120页，明明平均每天看多少页？
<gadget id="calculator">240 - 120</gadget>
<output>120</output>

<gadget id="calculator">120 / 5</gadget>
<output>24</output>

<result>24</result>