Aunt Wang deposits 5,000 yuan in the bank, and deposits and withdraws regularly for 3 years. If the annual interest rate is calculated at 2.70%, 20% interest income tax will be paid when it is due. How much will she receive in principal and after-tax interest after maturity?
王阿姨把5000元钱存入银行，定期整存整取3年．如果年利率按2.70%计算，到期要交纳20%的利息所得税．到期后，她可获得本金和税后利息共多少元？
<gadget id="calculator">2.7 / 100</gadget>
<output>0.027</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">5_000 * 0.027 * 3 * (4/5)</gadget>
<output>324</output>

<gadget id="calculator">5_000 + 324</gadget>
<output>5_324</output>

<result>5_324</result>