Mom bought 3 pairs of the same cotton socks, each pair was 2 yuan 7 cents and 5 cents, she paid the salesperson 10 yuan, how much should she get back?
妈妈买了3双同样的棉袜，每双2元7角5分，她付给售货员10元钱，应找回多少钱？
<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">2 + (7/10) + (1/20)</gadget>
<output>11/4 = around 2.75</output>

<gadget id="calculator">(11/4) * 3</gadget>
<output>33/4 = around 8.25</output>

<gadget id="calculator">10 - (33/4)</gadget>
<output>7/4 = around 1.75</output>

<result>7/4 = around 1.75</result>