Dongdong deposits 500 yuan of New Year's money in the bank, deposits and withdraws for three years, if the annual interest rate is 3.24%, how much after-tax interest can he get after maturity. (if the interest tax rate is 5%)
冬冬将500元的压岁钱存入银行，整存整取三年，若年利率是3.24%，到期后可以得到税后利息多少元．(若利息税税率为5%)
<gadget id="calculator">3.24 / 100</gadget>
<output>0.0324</output>

<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 - (1/20)</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">500 * 0.0324 * 3 * (19/20)</gadget>
<output>46.17</output>

<result>46.17</result>