Xiao Ming deposits the 1,000 yuan he usually saves in the bank, and deposits and withdraws it in lump sum for 3 years, with an annual interest rate of 3.24%. How much after-tax interest can he withdraw per hour when the maturity is due? (The state stipulates that the interest tax is 20%)
小明把平时积攒的1000元存入银行，整存整取3年，年利率是3.24%，到期时小时可以取出税后利息是多少元？(国家规定利息税是20%)
<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">1_000 * 0.0324 * 3 * (4/5)</gadget>
<output>77.76</output>

<result>77.76</result>