The number of popular science books in the school library accounts for 35% of the total number of books, and the number of mathematics books accounts for 25% of the total number of books. There are 1,248 known popular science books and mathematics books. How many books are there in the school library?
学校图书馆的科普读物册数占图书总数的35%，数学读物册数占图书总数的25%．已知科普读物和数学读物共1248册，学校图书馆一共有图书多少册？
<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(7/20) + (1/4)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1_248 / (3/5)</gadget>
<output>2_080</output>

<result>2_080</result>