In 2005, my country promulgated a new personal income tax collection standard. Personal income below 1,600 yuan is not taxed. Personal income tax is levied on the portion of the monthly income exceeding 1,600 yuan at 10%. Xiao Ming's mother has a monthly income of 3,500 yuan. How much personal income tax does she have to pay every month?
2005年我国公布了新的个人收入所得税征收标准．个人收入1600元以下不征税．月收入超过1600元的部分按10%征收个人所得税．小明的妈妈月收入3500元，她每月要缴纳多少元个人所得税？
<gadget id="calculator">3_500 - 1_600</gadget>
<output>1_900</output>

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

<gadget id="calculator">1_900 * (1/10)</gadget>
<output>190</output>

<result>190</result>