To celebrate the National Day, the fourth grade purchased 426 small national flags. After distributing to 12 classes, there are 54 noodles left. What is the average number of points per class?
为庆祝国庆，四年级购买了426面小国旗．分给12个班后还剩下54面．平均每班分得多少面？
<gadget id="calculator">426 - 54</gadget>
<output>372</output>

<gadget id="calculator">372 / 12</gadget>
<output>31</output>

<result>31</result>