Wang Hua deposits 5,000 yuan in the bank, deposits and withdraws in lump sum for 5 years, with an annual interest rate of 3.6%, if the interest tax rate is 20%, how much after-tax interest can he get at maturity?
王华把5000元钱存入银行，整存整取5年，年利率为3.6%，如果利息税率为20%，到期可得税后利息多少元？
<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>