The annual interest rate of one-year lump sum deposit and withdrawal deposit is 3.05%. Li Ping deposits a one-year lump sum deposit and withdrawal deposit of 1,000 yuan today. How much after-tax interest can he get from the bank when it matures?
一年期整存整取存款的年利率为3.05%．李平今天存入一年期整存整取存款1000元，到期时，他能从银行里得到税后利息多少元．
<gadget id="calculator">3.05 / 100</gadget>
<output>0.0305</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 * 0.0305 * 1 * (4/5)</gadget>
<output>24.4</output>

<result>24.4</result>