The school bought 288 story books, which were distributed to 6 grades on average, and each grade had 4 classes. How many books were distributed to each class on average?
学校里买了288本故事书，平均分给6个年级，每个年级4个班，平均每个班分得多少本？
<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<gadget id="calculator">288 / 24</gadget>
<output>12</output>

<result>12</result>