A bottle of Sprite is priced at 2 yuan and 80 cents, and a bag of biscuits is 0.8 yuan more expensive than a bottle of Sprite. Xiaopang bought a bag of biscuits for 5 yuan, how much should I get back?
一瓶雪碧售价2元8角，一袋饼干比一瓶雪碧贵0.8元．小胖用5元钱买了一袋饼干，应找回多少元？
<gadget id="calculator">8 / 10</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2 + (4/5)</gadget>
<output>14/5 = around 2.8</output>

<gadget id="calculator">(14/5) + 0.8</gadget>
<output>3.6</output>

<gadget id="calculator">5 - 3.6</gadget>
<output>1.4</output>

<result>1.4</result>