The fourth, fifth and sixth grades each have 2 classes. If 108 students go to the nursing home to clean, how many students should each class choose on average?
四、五、六年级各有2个班，要是108名同学去敬老院打扫卫生，平均每班要选多少名同学？
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">108 / 6</gadget>
<output>18</output>

<result>18</result>