Xiaoli deposits 10,000 yuan in the bank for a period of three years with an annual interest rate of 2.7%. How much after-tax interest can she get when it matures?
小丽把10000元钱存入银行，存期三年，年利率是2.7%，到期时她可得到税后利息是多少元．
<gadget id="calculator">2.7 / 100</gadget>
<output>0.027</output>

<gadget id="calculator">10_000 * 0.027 * 3</gadget>
<output>810</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">810 * (4/5)</gadget>
<output>648</output>

<result>648</result>