Xiaolan's mother deposited 8,000 yuan in the bank for a period of two years. The annual interest rate is 2.25%. When it matures, how much after-tax interest can she get.
小兰的妈妈把8000元钱存入银行，存期二年．年利率是2.25%，到期时，她可获得税后利息多少元．
<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">8_000 * 0.0225 * 2 * (19/20)</gadget>
<output>342</output>

<result>342</result>