Binding exercise books with a batch of paper, each with 32 pages, can be bound into 15 books. If it is bound into 24 volumes, what is the average number of pages per volume?
用一批纸装订练习本，每本32页，可以装订成15本．如果装订成24本，平均每本是多少页？
<gadget id="calculator">32 * 15</gadget>
<output>480</output>

<gadget id="calculator">480 / 24</gadget>
<output>20</output>

<result>20</result>