The school has 6 grades, and each grade has 4 classes. This year, the whole school planted 480 trees. How many trees are planted in each class on average?
学校有6个年级，每个年级4个班，今年全校共植树480棵，平均每个班种几棵？
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">480 / 20</gadget>
<output>24</output>

<result>24</result>