Dad deposits 50,000 yuan in the bank for 3 years, with an annual interest rate of 3.78%. After deducting the interest tax (interest tax is 5%), how much is the after-tax interest after maturity?
爸爸将50000元存入银行，定期3年，年利率是3.78%，扣除利息税(利息税是5%)后，到期后税后利息多少元？
<gadget id="calculator">3.78 / 100</gadget>
<output>0.0378</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">50_000 * 0.0378 * 3 * (19/20)</gadget>
<output>5_386.5</output>

<result>5_386.5</result>