Use a batch of paper to bind exercise books of the same size. If each book has 16 pages, 225 books can be bound. If each book has 18 pages, how many books can be bound? (Solve with ratio)
用一批纸装订同样大小的练习本，如果每本16页，可以装订225本．如果每本18页，可以装订多少本？(用比例解)
<gadget id="calculator">225 * 16</gadget>
<output>3_600</output>

<gadget id="calculator">3_600 / 18</gadget>
<output>200</output>

<result>200</result>