In the "Hope Project" donation activity, Xiaoxiao donated 3.4 yuan, and Xiaoqing donated 5.7 yuan more than Xiaoxiao. How much did Xiaoqing donate?
向"希望工程"捐款活动中，笑笑捐了3.4元，小青比笑笑多捐了5.7元，小青捐了多少元？
<gadget id="calculator">3.4 + 5.7</gadget>
<output>9.1</output>

<result>9.1</result>