Zhang Qiang deposits 50,000 yuan in the bank for three years, with an annual interest rate of 2.70%. How much after-tax interest can he get at maturity?
张强把5万元存入银行，定期三年，年利率为2.70%，到期他可以得到税后利息多少元．
<gadget id="calculator">5 * 10_000</gadget>
<output>50_000</output>

<gadget id="calculator">2.7 / 100</gadget>
<output>0.027</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 * 0.027 * 3 * (19/20)</gadget>
<output>3_847.5</output>

<result>3_847.5</result>