The students went to plant trees and divided into 5 teams, with 12 people in each team. On average, each person planted 3 trees. How many trees were planted in total?
同学们去植树，分成5个小队，每个小队12人，平均每人植树3棵，一共植树多少棵？
<gadget id="calculator">12 * 5</gadget>
<output>60</output>

<gadget id="calculator">3 * 60</gadget>
<output>180</output>

<result>180</result>