Xiaohua deposits 500 yuan of New Year's money in the bank for a period of three years, with an annual interest rate of 3.24% and interest tax of 20%. What is the sum of the principal and interest he gets after the maturity date?
小华把500元压岁钱存入银行，存期三年，年利率是3.24%，利息税是20%．到期后他得到的本息和是多少元．
<gadget id="calculator">3.24 / 100</gadget>
<output>0.0324</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">500 * 0.0324 * 3 * (4/5)</gadget>
<output>38.88</output>

<gadget id="calculator">500 + 38.88</gadget>
<output>538.88</output>

<result>538.88</result>