There are 400 literature and art books in the school library. The number of literature and art books is (4/5) that of science and technology books, and the number of story books is less than that of science and technology books (1/4). How many story books are there?
学校图书室有文艺书400本，文艺书的本数是科技书的(4/5)，故事书的本数比科技书少(1/4)，故事书有多少本？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">400 / (4/5)</gadget>
<output>500</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">500 * (1/4)</gadget>
<output>125</output>

<gadget id="calculator">500 - 125</gadget>
<output>375</output>

<result>375</result>