Xiaoming's father received a labor fee of 3,000 yuan, of which 1,000 yuan was tax-free, and the rest was taxed at a rate of 20%. How much is the total tax for this service fee?
小明爸爸得到一笔3000元的劳务费用，其中1000元是免税的，其余部分要按20%的税率缴税．这笔劳务费用一共要缴税多少元？
<gadget id="calculator">3_000 - 1_000</gadget>
<output>2_000</output>

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

<gadget id="calculator">2_000 * (1/5)</gadget>
<output>400</output>

<result>400</result>