On Arbor Day, two teachers and classmates went to plant trees. There were 3 students in each group, and there were 42 groups in total. How many people went there?
植树节那天，两位老师和同学们去植树，同学们每组3人，一共有42组，一共去了多少人？
<gadget id="calculator">42 * 3</gadget>
<output>126</output>

<gadget id="calculator">126 + 2</gadget>
<output>128</output>

<result>128</result>