Xiaoyuan's father bought a lottery ticket and won a prize. The state stipulates that a single bet winning amount of 10,000 yuan must pay 20% personal income tax. Dad won a lottery of 12,000 yuan. How much can he get after tax?
小园的爸爸买一注彩票中了奖，国家规定单注中奖金额1万元口上需缴纳20%的个人所得税，爸爸中奖12000元，税后能拿到多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">12_000 * (1/5)</gadget>
<output>2_400</output>

<gadget id="calculator">12_000 - 2_400</gadget>
<output>9_600</output>

<result>9_600</result>