citizen's salary income exceeding 1600 yuan should be paid personal income tax at 5%. Aunt Li's monthly salary is 1980 yuan. How much personal income tax should Aunt Li pay to the state every month?
公民的工资收入超过1600元的部分应按5%缴纳个人所得税，李阿姨每个月的工资是1980元，李阿姨每月应向国家缴纳多少元个人所得税．
<gadget id="calculator">1_980 - 1_600</gadget>
<output>380</output>

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

<gadget id="calculator">380 * (1/20)</gadget>
<output>19</output>

<result>19</result>