The printing factory binds English exercise books with a batch of paper. If each copy has 36 pages, you can order 4,000 copies. If each copy has 32 pages, how many copies can you order?
印刷厂用一批纸装订英语练习本．如果每本36页，能订4000本，如果每本32页，能订多少本？
<gadget id="calculator">36 * 4_000</gadget>
<output>144_000</output>

<gadget id="calculator">144_000 / 32</gadget>
<output>4_500</output>

<result>4_500</result>