Aunt Li deposited 20,000 yuan in China Construction Bank on April 1, 2004, with an annual interest rate of 4.14%. By April 1 this year, how much will he get with the principal and interest? (20% interest tax due)
李大妈于2004年4月1日在中国建设银行存入二万元人民币，年利率4.14%，到今年的4月1日他连本带利可拿到多少元．(到期要交纳20%的利息税)
<gadget id="calculator">4.14 / 100</gadget>
<output>0.0414</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">20_000 * 0.0414 * (4/5) * 8</gadget>
<output>5_299.2</output>

<gadget id="calculator">5_299.2 + 20_000</gadget>
<output>25_299.2</output>

<result>25_299.2</result>