Xiao Cong brought 10 yuan to the supermarket to buy French fries and soda. The bag of French fries is 5.7 yuan, and the bottle of soda is 2.5 yuan. How much should I get back?
小聪带了10元钱去超市买薯条和汽水，薯条每袋5.7元，汽水每瓶2.5元，应找回多少元？
<gadget id="calculator">5.7 + 2.5</gadget>
<output>8.2</output>

<gadget id="calculator">10 - 8.2</gadget>
<output>1.8</output>

<result>1.8</result>