There are 180 comic books in the school library, the number of technology books is (3/4) of the number of comic books, and (1/3) of the number of story books. How many story books are there?
学校图书室里有连环画册180本，科技书的本数是连环画册的(3/4)，是故事书本数的(1/3)．求故事书有多少本？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(3/4) / (1/3)</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">180 * (9/4)</gadget>
<output>405</output>

<result>405</result>