Xiaodong deposited 1,000 yuan in the bank on June 13, 2006. The lump-sum deposit was withdrawn for two years, and the annual interest rate was 2.25%. Just when the Sichuan earthquake happened, Xiaodong was going to take out the money and donate the after-tax interest to "Sichuan disaster victims" to support the earthquake relief. How much can Xiaohua donate. (Hint: the interest tax rate is 20%)
小东2006年6月13日把1000元钱存入银行，整存整取二年，年利率是2.25%．恰好在到期时发生了四川地震，小东准备将钱取出来把税后利息捐赠给"四川灾民"，支援抗震救灾，小华可以捐出多少元钱．(提示：利息税税率为20%)
<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">1_000 * 0.0225 * 2 * (4/5)</gadget>
<output>36</output>

<result>36</result>