Aunt Li deposits 20,000 yuan in the bank for a period of two years with an annual interest rate of 3.33%. How much can she get back the principal and after-tax interest when it expires?
李大妈把20000元存入银行，存期两年，年利率是3.33%，到期时她可以取回本金和税后利息共多少元？
<gadget id="calculator">3.33 / 100</gadget>
<output>0.0333</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">20_000 * 0.0333 * 2 * (19/20)</gadget>
<output>1_265.4</output>

<gadget id="calculator">20_000 + 1_265.4</gadget>
<output>21_265.4</output>

<result>21_265.4</result>