Now, the annual interest rate of the 3-year fixed deposit is 2.70%, and 20% interest tax will be paid when it matures. Li Ming has saved 1,000 yuan for a period of 3 years, how much after-tax interest can he get when it expires?
现在，3年定期存款的年利率是2.70%，到期时还要缴纳20%的利息税．李明存了1000元钱，定期3年，到期时可得税后利息多少元．
<gadget id="calculator">2.7 / 100</gadget>
<output>0.027</output>

<gadget id="calculator">1_000 * 3 * 0.027</gadget>
<output>81</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">81 * (4/5)</gadget>
<output>324/5 = around 64.8</output>

<result>324/5 = around 64.8</result>