Dad deposits 50,000 yuan in the bank for 3 years, with an annual interest rate of 4.95% and an interest tax of 20%.
爸爸将50000元钱存入银行，定期3年，年利率4.95%，利息税20%，到期后实得利息多少元．
<gadget id="calculator">4.95 / 100</gadget>
<output>0.0495</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">50_000 * 0.0495 * 3 * (4/5)</gadget>
<output>5_940</output>

<result>5_940</result>