Xiao Ming's father deposited 4,000 yuan in the bank for 2 years on a regular basis with an annual interest rate of 2.25%. According to regulations, personal deposits should pay 20% interest income tax. After the expiration of two years, how much will Dad get back the principal and interest?
小明的爸爸将4000元存入银行，定期2年，年利率是2.25%，按规定个人存款应交纳20%的利息所得税．两年到期后，爸爸取回本息共多少元．
<gadget id="calculator">2.25 / 100</gadget>
<output>0.0225</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">4_000 * 0.0225 * 2 * (4/5)</gadget>
<output>144</output>

<gadget id="calculator">4_000 + 144</gadget>
<output>4_144</output>

<result>4_144</result>