Mom deposits 5,000 yuan in the bank for three years, with an annual interest rate of 5.4%. How much is the total amount of principal and after-tax interest after maturity? (Pay interest tax at 5%)
妈妈存入银行5000元，定期三年，年利率5.4%，到期后本金和税后利息共得多少钱？(按5%缴利息税)
<gadget id="calculator">5.4 / 100</gadget>
<output>0.054</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">5_000 * 0.054 * 3 * (19/20)</gadget>
<output>769.5</output>

<gadget id="calculator">5_000 + 769.5</gadget>
<output>5_769.5</output>

<result>5_769.5</result>