The school bought 3 packs of chalk, each with 12 boxes, and distributed them to 9 classes on average. How many boxes did each class get?
学校买了3包粉笔，每包12盒，平均分给9个班，每个班分得多少盒？
<gadget id="calculator">3 / 9</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12 * (1/3)</gadget>
<output>4</output>

<result>4</result>