This year's "May 1st" Festival, Mr. Wang deposits 5,000 yuan in the bank, with a deposit period of one year and an annual interest rate of 1.98%. According to regulations, after the expiration, he must pay 20% interest tax to the state. How much will Mr. Wang get in interest on May 1st next year?
今年"五一"节，王老师到银行存款5000元，存期一年，年利率为1.98%．按规定，到期后，他必须向国家缴纳20%的利息税，明年"五一"节王老师将得到利息多少元．
<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 * 1 * 0.0198 * (4/5)</gadget>
<output>79.2</output>

<result>79.2</result>