Mr. Liu’s salary in January is 2,100 yuan. According to the current personal tax law, the portion exceeding 2,000 yuan is subject to 20% personal income tax. How much is Mr. Liu’s actual monthly income?
刘老师一月份工资2100元，按现行个人税法规定，超过2000元部分按照20%缴纳个人所得税，刘老师实际这个月收入多少元？
<gadget id="calculator">2_100 - 2_000</gadget>
<output>100</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">100 * (1/5)</gadget>
<output>20</output>

<gadget id="calculator">2_100 - 20</gadget>
<output>2_080</output>

<result>2_080</result>