hope that there are 300 story books in the primary school library, which is 1/4 more than popular science books. How many popular science books are there?
希望小学图书室有故事书300本，比科普读物多(1/4)，科普读物有多少本？
<gadget id="calculator">1 / 4</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">300 / (5/4)</gadget>
<output>240</output>

<result>240</result>