The annual interest rate of the three-year time deposit is 2.7%. Li Yan deposits 4,000 yuan in the bank, and she has to pay 20% interest tax when she withdraws money after three years. How much interest tax should Li Yan pay?
三年定期存款的年利率是2.7%．李燕把4000元存入银行，三年后取款时要缴纳20%的利息税，李燕应缴纳利息税多少元？
<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">4_000 * 0.027 * 3 * (1/5)</gadget>
<output>64.8</output>

<result>64.8</result>