Mother's monthly salary is 2,800 yuan. According to regulations, the part exceeding 2,000 yuan is subject to personal income tax at a rate of 20%. How much is the mother's personal income tax?
妈妈的月工资是2800元，按规定超出2000元的部分按20%的税率缴纳个人所得税，妈妈缴纳个人所得税多少元．
<gadget id="calculator">2_800 - 2_000</gadget>
<output>800</output>

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

<gadget id="calculator">800 * (1/5)</gadget>
<output>160</output>

<result>160</result>