The annual interest rate of the bank's three-year deposit is 2.07%. Mr. Li has saved 40,000 yuan. How much is the principal and interest after maturity? (Interest tax is 20%)
银行的三年期存款的年利率是2.07%，李老师存了4万元钱，到期后实的本金和利息一共多少元？(利息税为20%)
<gadget id="calculator">2.07 / 100</gadget>
<output>0.0207</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">40_000 * 0.0207 * 3 * (4/5)</gadget>
<output>1_987.2</output>

<gadget id="calculator">40_000 + 1_987.2</gadget>
<output>41_987.2</output>

<result>41_987.2</result>