The school bought a total of 1,200 story books and science books. The ratio of the number of science books to story books is 6:4. How many story books did the school buy?
学校买来故事书和科技书共1200本科技书和故事书本数的比是6：4，学校买来故事书多少本？
<gadget id="calculator">6 + 4</gadget>
<output>10</output>

<gadget id="calculator">4 / 10</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1_200 * (2/5)</gadget>
<output>480</output>

<result>480</result>