Mom invites grandma to have breakfast, buys 2 bowls of dumplings, each bowl costs 2 yuan and 80 cents, and pays the salesperson 10 yuan, how much should I get back?
妈妈请奶奶吃早餐，买了2碗水饺，每碗2元8角，付给营业员10元钱，应找回多少钱？
<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) * 2</gadget>
<output>28/5 = around 5.6</output>

<gadget id="calculator">10 - (28/5)</gadget>
<output>22/5 = around 4.4</output>

<result>22/5 = around 4.4</result>