Our country stipulates that citizens with a monthly income of more than 1,600 yuan are required to pay personal income tax, the part that exceeds 500 yuan is taxed 5%, the part that exceeds 500 to 2,000 yuan is taxed 10%; the part that exceeds 2,000 to 5,000 yuan is taxed 15% , Xiaohong's father earns 3,500 yuan a month, how much should he pay personal income tax every month?
我们国家规定，公民月收人在1600元以上的要缴纳个人所得税，超出500元以内的部分纳税5%，超出500至2000元的部分纳税10%；超出2000元至5000元的部分纳税15%，小红的爸爸每月收人3500元，他每月应檄纳个人所得税多少钱？
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">500 * (1/20)</gadget>
<output>25</output>

<gadget id="calculator">3_500 - 1_600</gadget>
<output>1_900</output>

<gadget id="calculator">1_900 - 500</gadget>
<output>1_400</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1_400 * (1/10)</gadget>
<output>140</output>

<gadget id="calculator">25 + 140</gadget>
<output>165</output>

<result>165</result>