Xiaoqing deposited 200 yuan in the bank on New Year's Day the year before last for 5 years, and planned to donate the after-tax interest (interest tax 20%) to poor areas after maturity. If the annual interest rate is calculated at 2.8%, how much Xiaoqing can donate when it expires Yuan money?
小青前年元旦把200元钱存入银行，定期5年，准备到期后把税后利息(利息税20%)捐赠给贫困地区，如果年利率按2.8%计算，到期小青可以捐多少元钱？
<gadget id="calculator">2.8 / 100</gadget>
<output>0.028</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">200 * 0.028 * 5 * (4/5)</gadget>
<output>22.4</output>

<result>22.4</result>