Grandma Li deposits 3,000 yuan for 2 years. If the annual interest rate is 4.68% and the interest tax rate is 20%, how much can she withdraw the principal and after-tax interest after maturity?
李奶奶存款3000元，定期2年，如果年利率是4.68%，利息税率是20%，到期后，她可以取出本金和税后利息多少元？
<gadget id="calculator">4.68 / 100</gadget>
<output>0.0468</output>

<gadget id="calculator">3_000 * 2 * 0.0468</gadget>
<output>280.8</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">280.8 * (4/5)</gadget>
<output>224.64</output>

<gadget id="calculator">3_000 + 224.64</gadget>
<output>3_224.64</output>

<result>3_224.64</result>