Aunt Wang deposited 3,000 yuan in the bank for two years, with an annual interest rate of 3.69%. After maturity, 20% interest tax should be paid. After paying the tax, how much can Aunt Wang get back the principal and interest?
王阿姨把3000元存入银行，定期二年，年利率是3.69%．到期后，应缴纳20%的利息税．纳税后，王阿姨可以取回本金和利息一共多少元？
<gadget id="calculator">3.69 / 100</gadget>
<output>0.0369</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">3_000 * 0.0369 * 2 * (4/5)</gadget>
<output>177.12</output>

<gadget id="calculator">3_000 + 177.12</gadget>
<output>3_177.12</output>

<result>3_177.12</result>