Obviously deposit 3,000 yuan in the bank for a period of two years, with an annual interest rate of 4.5%. When it is due, how much after-tax interest can he get. (the interest tax rate is 5%)
明明将3000元存人银行，定期二年，年利率是4.5%．到期时，他可获得税后利息多少元．(利息税的税率是5%)
<gadget id="calculator">4.5 / 100</gadget>
<output>0.045</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">3_000 * 0.045 * 2 * (19/20)</gadget>
<output>256.5</output>

<result>256.5</result>