Xiaofang bought a pen and spent 6 yuan, 50 cents and 4 cents, and bought a diary for 2 yuan and 7 cents. She paid the salesperson 10 yuan, how much should she get back? (calculated with decimals)
小芳买一支钢笔，用去6元5角4分，买一本日记本用去2元7角，她付给营业员10元钱，应找回多少元？(用小数计算)
<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">4 / 100</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">6 + (1/2) + (1/25)</gadget>
<output>327/50 = around 6.54</output>

<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">2 + (7/10)</gadget>
<output>27/10 = around 2.7</output>

<gadget id="calculator">(327/50) + (27/10)</gadget>
<output>231/25 = around 9.24</output>

<gadget id="calculator">10 - (231/25)</gadget>
<output>19/25 = around 0.76</output>

<result>19/25 = around 0.76</result>