Zhang Hua deposits 2,000 yuan in the bank for 5 years, and the annual interest rate is 2.80%. What is the after-tax interest Zhang Hua can get when it matures?
张华把2000元钱存入银行，存整取5年，年利率是2.80%，到期时张华可得税后利息是多少元．
<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">2_000 * 0.028 * 5 * (4/5)</gadget>
<output>224</output>

<result>224</result>