There are 5 classes in the third grade, each class has 4 groups, each group plants 16 trees, how many trees are planted in total?
三年级有5个班，每班有4个小组，每组植树16棵，一共植树多少棵？
<gadget id="calculator">16 * 4 * 5</gadget>
<output>320</output>

<result>320</result>