There are 12,000 science books, art books and story books in the school library, of which science books account for (1/3), and the ratio of science books to story books is 2:3. How many story books are there?
学校图书馆的科技书、文艺书和故事书共12000本，其中科技书占(1/3)，科技书与故事书的比是2：3，故事书有多少本？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">12_000 * (1/3) * (3/2)</gadget>
<output>6_000</output>

<result>6_000</result>