The school organizes tree planting labor, with an average of 20 trees planted per person. There are 61 students in class one and 73 students in class two. How many trees are planted in total in the two classes?
学校组织植树劳动，平均每人植树20棵．一班有学生61人，二班有学生73人，两个班一共植树多少棵？
<gadget id="calculator">61 + 73</gadget>
<output>134</output>

<gadget id="calculator">134 * 20</gadget>
<output>2_680</output>

<result>2_680</result>