Xiao Ming spent 7.2 yuan to buy books, 2.6 yuan to buy pens, and paid 10 yuan to the salesperson. How much should I get back?
小明买书用去7.2元，买钢笔用去2.6元，付给售货员10元，应找回多少元？
<gadget id="calculator">10 - 7.2 - 2.6</gadget>
<output>0.2</output>

<result>0.2</result>