Chengguan Primary School launched the "I am a small guard of environmental protection" activity. Class 3 and Class 1 picked up 369 discarded plastic bags, and Class 3 and Class 2 picked up 441. How many discarded plastic bags were picked up in total by Class 3 and Class 2?
城关小学开展"我是环保小卫士"活动．三1班同学捡了369个废弃塑料袋，三2班捡了441个，两班一共捡了多少个废弃塑料袋．
<gadget id="calculator">369 + 441</gadget>
<output>810</output>

<result>810</result>