Xiaohong deposits 1,000 yuan of New Year's money in the bank for a period of 3 years, with an annual interest rate of 3%. How much after-tax interest will he get from the bank when it matures? (interest tax 5%)
小红把1000元压岁钱存入银行，定期3年，年利率是3%，他到期时从银行里拿到税后利息多少元？(利息税5%)
<gadget id="calculator">3 / 100</gadget>
<output>3/100 = around 0.03</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 * (3/100) * 3 * (19/20)</gadget>
<output>171/2 = around 85.5</output>

<result>171/2 = around 85.5</result>