Aunt Li deposited 5,000 yuan in the bank in December 2004 for 5 years in lump sum deposits and withdrawals, with an annual interest rate of 3.60%. How much after-tax interest can I get when it is due? (Interest tax is 20%)
李阿姨2004年12月把5000元钱存入银行，整存整取存5年，年利率为3.60%．到期时可得到税后利息多少元？(利息税为20%)
<gadget id="calculator">3.6 / 100</gadget>
<output>0.036</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 * 0.036 * 5 * (4/5)</gadget>
<output>720</output>

<result>720</result>