Xiaoqiang deposits 1,000 yuan in the bank with a deposit period of 3 years and an annual interest rate of 2.7%. The state stipulates that the interest on deposits should be taxed at a rate of 20%. May I ask how much his after-tax interest is after the maturity date? (Interest = principal * interest rate * time)
小强把1000元存入银行，存期3年，年利率2.7%，国家规定，存款的利息要按20%的税率纳税，请问到期后他的税后利息是多少元．(利息=本金*利率*时间)
<gadget id="calculator">2.7 / 100</gadget>
<output>0.027</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">1_000 * 0.027 * 3 * (4/5)</gadget>
<output>64.8</output>

<result>64.8</result>