The list does not count: the library has 3,200 popular science books, accounting for (2/5) of all books. How many books are there in the library?
只列式不计算：图书馆有科普读物3200本，占全部图书的(2/5)，图书馆共有图书多少本？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">3_200 / (2/5)</gadget>
<output>8_000</output>

<result>8_000</result>