Li Ming deposited 2,000 yuan in the bank on October 1, 1999, and made regular lump sum deposits and withdrawals for 2 years. If the annual interest rate is calculated at 2.43%, how much can he withdraw the principal and after-tax interest when he withdraws it on October 1, 2001? (tax rate 20%)
李明1999年10月1日把2000元存入银行，定期整存整取2年．如果年利率按2.43%计算，到2001年10月1日取出时，他可以取出本金和税后利息共多少元？(税率20%)
<gadget id="calculator">2.43 / 100</gadget>
<output>0.0243</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">2_000 * 0.0243 * 2 * (4/5)</gadget>
<output>77.76</output>

<gadget id="calculator">2_000 + 77.76</gadget>
<output>2_077.76</output>

<result>2_077.76</result>