The sports group needs to buy 6 sets of table tennis cards, each set is 5 yuan, 2.6 cents, and the teacher pays the salesperson 40 yuan. How much should I get back?
体育组要买6副乒乓球牌，每副5元2角6分，老师付给营业员40元，应找回多少钱？
<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">6 / 100</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">5 + (1/5) + (3/50)</gadget>
<output>263/50 = around 5.26</output>

<gadget id="calculator">(263/50) * 6</gadget>
<output>789/25 = around 31.56</output>

<gadget id="calculator">40 - (789/25)</gadget>
<output>211/25 = around 8.44</output>

<result>211/25 = around 8.44</result>