The People's Bank of China stipulates that the annual interest rate for two-year lump sum deposits and withdrawals is 2.25%. The interest tax is 5%. Li Ping deposits 1,000 yuan today for two years. After maturity, in addition to the principal, how much is the after-tax interest he will get.
中国人民银行规定：两年期整存整取存款的年利率为2.25%．利息税是5%，李平今天存入1000元，定期两年．到期后，除本金外，他得到的税后利息是多少元．
<gadget id="calculator">2.25 / 100</gadget>
<output>0.0225</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">1_000 * 2 * 0.0225 * (19/20)</gadget>
<output>42.75</output>

<result>42.75</result>