According to national regulations, a 20% tax is levied on the interest earned by individuals on bank deposits. Grandma Li deposits 10,000 yuan in the bank for a fixed period of one year, with an annual interest rate of 2.25%. How much interest will Grandma Li actually get after one year?
按照国家规定，对个人在银行存款所得的利息要征收20%的税，李奶奶存入银行10000元，定期一年，年利率是2.25%，一年后李奶奶实得利息多少元？
<gadget id="calculator">2.25 / 100</gadget>
<output>0.0225</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">10_000 * 0.0225 * 1 * (4/5)</gadget>
<output>180</output>

<result>180</result>