There are 500 literary books in the library, and 25% more story books than literary books. How many story books are there?
图书室有文艺书500本，故事书比文艺书多25%，故事书有多少本？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">500 * (5/4)</gadget>
<output>625</output>

<result>625</result>