On June 1 last year, Uncle Zhang deposited RMB 5,000 in the bank for one year with an annual interest rate of 1.98%. How much after-tax interest should Uncle Zhang receive when it expires on June 1 this year (interest tax 20%)?
去年6月1日，张大爷把5000元人民币存入银行，定期1年，年利率为1.98%，今年6月1日到期时张大爷应得到税后利息多少元(利息税20%)．
<gadget id="calculator">1.98 / 100</gadget>
<output>0.0198</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">5_000 * 0.0198 * 1 * (4/5)</gadget>
<output>79.2</output>

<result>79.2</result>