There are 500 story books in the school library, accounting for (1/13) of all books. How many books are there in the school library?
学校图书馆有故事书500本，占全部图书的(1/13)，学校图书馆共有图书多少本？
<gadget id="calculator">1 / 13</gadget>
<output>1/13 = around 0.076923</output>

<gadget id="calculator">500 / (1/13)</gadget>
<output>6_500</output>

<result>6_500</result>