Uncle Wang deposits 3,000 yuan in the bank for 5 years. If the annual interest rate is 2.8%, how much is the total amount of principal and after-tax interest that Uncle Wang can withdraw at maturity?
王叔叔把3000元存入银行，定期5年，如果年利率是2.8%，王叔叔到期可取本金和税后利息一共多少元？
<gadget id="calculator">2.8 / 100</gadget>
<output>0.028</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 * 0.028 * 5 * (4/5)</gadget>
<output>336</output>

<gadget id="calculator">3_000 + 336</gadget>
<output>3_336</output>

<result>3_336</result>