Aunt Li deposited 3,000 yuan in the bank for a period of three years, with an annual interest rate of 2.52%. Pay tax at 20% of the interest. Please help Aunt Li to calculate, how much is the total amount of principal and after-tax interest due?
李阿姨把3000元钱存入银行，定期三年，年利率是2.52%．按利息的20%缴纳税金．请你帮助李阿姨算一算，到期时本金和税后利息一共应得多少元？
<gadget id="calculator">2.52 / 100</gadget>
<output>0.0252</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">3_000 * 0.0252 * 3 * (4/5)</gadget>
<output>181.44</output>

<gadget id="calculator">3_000 + 181.44</gadget>
<output>3_181.44</output>

<result>3_181.44</result>