Dongdong will deposit 1,000 yuan of lucky money in the bank after the Spring Festival this year for three years, and plans to donate the interest to the "Candlelight Project" after the maturity date. If the annual interest rate is 2.52%, how much is the after-tax interest after maturity?
东东今年春节后将1000元压岁钱存入银行，定期三年，准备到期后将利息捐赠给"烛光工程"，如果年利率为2.52%，到期后税后利息是多少元？
<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">1_000 * 0.0252 * 3 * (4/5)</gadget>
<output>60.48</output>

<result>60.48</result>