Xiaohong binds a batch of papers into exercise books of the same size. If each book has 18 sheets, 200 books can be bound. If each book has 24 sheets, how many books can be bound? (Solve with ratio)
小红把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24张，可以装订多少本？(用比例解)
<gadget id="calculator">18 * 200</gadget>
<output>3_600</output>

<gadget id="calculator">3_600 / 24</gadget>
<output>150</output>

<result>150</result>