Uncle Chen's monthly salary is 4,800 yuan. According to regulations, the part after 3,000 yuan is subject to personal income tax at a rate of 5%. How much should Uncle Chen pay?
陈叔叔每月工资是4800元，按规定，3000元后的部分按5%的税率缴纳个人所得税，陈叔叔应缴纳多少元？
<gadget id="calculator">4_800 - 3_000</gadget>
<output>1_800</output>

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

<gadget id="calculator">1_800 * (1/20)</gadget>
<output>90</output>

<result>90</result>