Use a batch of paper to bind exercise books of the same size. If each book has 18 sheets, 200 books can be bound. If each book has 16 sheets, how many books can be bound? (Use the method of proportion to answer.)
用一批纸装订成同样大小的练习本，如果每本18张，可以装订200本．如果每本16张，可以装订多少本？(用比例的方法解答．)
<gadget id="calculator">200 * 18</gadget>
<output>3_600</output>

<gadget id="calculator">3_600 / 16</gadget>
<output>225</output>

<result>225</result>