Manager Li received a bonus of 4,200 yuan this month. According to relevant regulations, personal income tax should be paid at 5% of income if the amount exceeds 1,200 yuan. How much after-tax bonus will Manager Li get this month?
李经理这个月得到奖金4200元，根据有关规定，超过1200元的应按收入的5%交个人所得税，李经理这个月可得税后奖金多少元？
<gadget id="calculator">4_200 - 1_200</gadget>
<output>3_000</output>

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

<gadget id="calculator">1 - (1/20)</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">3_000 * (19/20)</gadget>
<output>2_850</output>

<gadget id="calculator">1_200 + 2_850</gadget>
<output>4_050</output>

<result>4_050</result>