Planting trees in spring, the first class of the third grade planted 161 trees, the second class planted 163 trees, and the third class planted 162 trees. How many trees were planted in each class on average?
春季植树，三年级一班共栽161棵，二班栽163棵，三班栽162棵，平均每班栽多少棵？
<gadget id="calculator">161 + 163 + 162</gadget>
<output>486</output>

<gadget id="calculator">486 / 3</gadget>
<output>162</output>

<result>162</result>