Xiaoming's mother's monthly salary income is 2,000 yuan. According to the tax law, the part exceeding 1,600 yuan is subject to personal income tax at a rate of 5%. How much personal income tax should Xiaohong's mother pay each month?
小明妈妈月工资收入是2000元，按税法规定，超过1600元的部分要按5%的税率缴纳个人所得税．小红妈妈每月应缴纳个人所得税多少元？
<gadget id="calculator">2_000 - 1_600</gadget>
<output>400</output>

<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">400 * (1/20)</gadget>
<output>20</output>

<result>20</result>