The number of story books in the library accounts for (1/3) of the total number of books, and the number of science and technology books is (3/5) of the story books. It is known that there are 800 science and technology books. How many books are there in the library?
图书馆的故事书数量占图书总数的(1/3)，科技书数量是故事书的(3/5)，已知有800本科技书，图书馆图书共多少本？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

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

<gadget id="calculator">800 / (1/5)</gadget>
<output>4_000</output>

<result>4_000</result>