A classmate from Xinghua Primary School planted a tree. The boys were divided into 109 groups, and the girls were divided into 102 groups. Each group consisted of 12 people. How many students participated in tree planting?
兴华小学的同学植树，男生分了109个组，女生分了102个组，每个组都是12个人．有多少同学参加植树？
<gadget id="calculator">109 + 102</gadget>
<output>211</output>

<gadget id="calculator">211 * 12</gadget>
<output>2_532</output>

<result>2_532</result>