Uncle Li received 5,000 yuan from one-time labor service remuneration, and the part after deducting 1,600 yuan is subject to personal income tax at a rate of 20%. How much tax should Uncle Li pay?
李叔叔一次劳务报酬所得5000元，按规定减去1600元后的部分按20%的税率缴纳个人所得税．李叔叔应缴纳税款多少元？
<gadget id="calculator">5_000 - 1_600</gadget>
<output>3_400</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">3_400 * (1/5)</gadget>
<output>680</output>

<result>680</result>