There are 24 science fiction books in the book corner of class 1 of the sixth year, accounting for (2/25) of all books, and story books accounting for (3/20) of all books. How many story books are there?
六年1班图书角有科幻书24本，占全部图书的(2/25)，故事书占全部图书的(3/20)，故事书有多少本．
<gadget id="calculator">2 / 25</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">24 / (2/25)</gadget>
<output>300</output>

<gadget id="calculator">3 / 20</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">300 * (3/20)</gadget>
<output>45</output>

<result>45</result>