badminton is 2.6 yuan, and a table tennis ball is 0.8 yuan. Xiao Ming paid 5 yuan to buy a badminton and a table tennis ball, how much should he get back?
一个羽毛球2.6元，一个乒乓球0.8元．小明付出5元钱买了一个羽毛球和一个乒乓球，应找回多少元？
<gadget id="calculator">2.6 + 0.8</gadget>
<output>3.4</output>

<gadget id="calculator">5 - 3.4</gadget>
<output>1.6</output>

<result>1.6</result>