The printing and distribution factory binds exercise books with a batch of paper. If each book has 60 pages, 1400 books can be bound, if each book has 50 pages, how many books can be bound? (Solve with the knowledge of proportion)
印发厂用一批纸装订练习本．如果每本60页，可以装订1400本，如果每本50页，可以装订多少本？(用比例的知识解)
<gadget id="calculator">60 * 1_400</gadget>
<output>84_000</output>

<gadget id="calculator">84_000 / 50</gadget>
<output>1_680</output>

<result>1_680</result>