There are 216 students in the third and fourth grades of Guangming Primary School. Each grade has three classes. How many students are there on average in each class?
光明小学三、四年级共有216人，每个年级有三个班，平均每个班有多少人．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">216 / 6</gadget>
<output>36</output>

<result>36</result>