The production workshop of a paper mill needs to bind exercise books of the same size. If each book has 20 sheets, 30 books can be bound. If each book has 25 sheets, how many books can be bound?
造纸厂生产车间要装订同样大小的练习本，如果每本20张，可以装订30本，如果每本25张，可以装订多少本？
<gadget id="calculator">20 * 30</gadget>
<output>600</output>

<gadget id="calculator">600 / 25</gadget>
<output>24</output>

<result>24</result>