There are 800 literature and art books in the library. The science and technology books are literature and art books (3/5), and the story books are science and technology books (2/3). How many story books are there?
图书馆有800本文艺书，科技书是文艺书的(3/5)，故事书是科技书的(2/3)，故事书有多少本？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">800 * (3/5) * (2/3)</gadget>
<output>320</output>

<result>320</result>