new batch of books in the library are placed on two shelves, A and B, and 60% of these books are placed on shelf A. If 200 books are taken out from shelf A and placed on shelf B, then both A and B The ratio of books on a bookshelf is 2:3, how many books are there in this batch?
图书馆新进一批图书，分别放在甲、乙两个书架上，甲书架放了这批书图书的60%，若从甲书架拿出200本放在乙书架上，那么甲、乙两个书架放的图书本书比是2：3，这批图书有多少本？
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/5) - (2/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">200 / (1/5)</gadget>
<output>1_000</output>

<result>1_000</result>