Zhao Heng's father deposited 40,000 yuan in the bank in December 2004, and tried to save it for 5 years, with an annual interest rate of 3.6%. (Interest tax is 20%)
召恒的爸爸2004年12月把40000元存入银行，整存争取存5年，年利率3.6%，到期时可得税后利息和本金一共多少元？(利息税为20%)
<gadget id="calculator">3.6 / 100</gadget>
<output>0.036</output>

<gadget id="calculator">40_000 * 0.036 * 5</gadget>
<output>7_200</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">40_000 * 0.036 * 5 * (1/5)</gadget>
<output>1_440</output>

<gadget id="calculator">7_200 - 1_440</gadget>
<output>5_760</output>

<gadget id="calculator">40_000 + 5_760</gadget>
<output>45_760</output>

<result>45_760</result>