Wang Hong deposited 15,000 yuan in the bank for a period of 3 years. If the annual interest rate is 2.4%, what is the total amount of principal and after-tax interest he can get when it matures? (Interest tax is 20% of interest)
王宏将15000元钱存入银行，定期3年．如果年利率是2.4%，到期时他可以获得本金和税后利息一共多少元？(利息税为利息的20%)
<gadget id="calculator">2.4 / 100</gadget>
<output>0.024</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">15_000 * 0.024 * 3 * (4/5)</gadget>
<output>864</output>

<gadget id="calculator">864 + 15_000</gadget>
<output>15_864</output>

<result>15_864</result>