The number of picture books in the library is (3/4) that of science and technology books, and the number of story books is (1/3) of that of science and technology books. There are 900 known comic books, how many story books are there?
图书室里连环画册的本数是科技书的(3/4)，故事书的本数是科技书的(1/3)．已知连环画有900本，求故事书有多少本？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">900 / (3/4)</gadget>
<output>1_200</output>

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

<gadget id="calculator">1_200 * (1/3)</gadget>
<output>400</output>

<result>400</result>