The school has 320 story books and 246 science and technology books. Story books account for (2/5) of the total number of books. How many books does the school have?
学校有故事书320本，科技书246本，故事书占图书总数的(2/5)，学校共有图书多少本？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<result>800</result>