A computer company asked Xiaohong’s father to design a set of software, and the company paid him 3,600 yuan. According to regulations, the part exceeding 800 yuan should be paid personal income tax at a rate of 20%. How much is Xiaohong’s father’s after-tax income?
某电脑公司请小红的爸爸设计了一套软件，公司付给他报酬3600元，按规定超过800元的部分应按20%的税率缴纳个人所得税，小红的爸爸税后所得是多少元？
<gadget id="calculator">3_600 - 800</gadget>
<output>2_800</output>

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

<gadget id="calculator">2_800 * (1/5)</gadget>
<output>560</output>

<gadget id="calculator">3_600 - 560</gadget>
<output>3_040</output>

<result>3_040</result>