Xiaohong bought a stationery box for 5.3 yuan and bought a notebook for 3.8 yuan. She gave the salesperson 10 yuan, how much should she get back?
小红买一个文具盒用了5.3元，买一本笔记本用了3.8元．她给售货员10元钱，应找回多少钱？
<gadget id="calculator">5.3 + 3.8</gadget>
<output>9.1</output>

<gadget id="calculator">10 - 9.1</gadget>
<output>0.9</output>

<result>0.9</result>