There are 300 popular science books in the school library, which is 1/3 more than story books. How many story books are there in the library? (First write out the quantitative relationship to solve the problem, and then answer).
学校图书室有科普读物300本，比故事书多(1/3)，图书室有故事书多少本？(先写出解决问题的数量关系，再解答)．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">300 / (4/3)</gadget>
<output>225</output>

<result>225</result>