The school newly purchased a batch of books, including 320 popular science books, accounting for (1/5) of all books. How many new books did the school purchase?
学校新购进一批书，其中科普读物有320本，占全部图书的(1/5)．学校新购进图书多少本？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">320 / (1/5)</gadget>
<output>1_600</output>

<result>1_600</result>