The elder brother and the younger brother went to play, the elder brother spent 3.4 yuan, and the younger brother spent 2.8 yuan, how much did they spend in total?
哥哥和弟弟去玩，哥哥花了3.4元，弟弟花了2.8元，两人共花多少元
<gadget id="calculator">3.4 + 2.8</gadget>
<output>6.2</output>

<result>6.2</result>