In 2004, Uncle Zhao bought the "China Post Card Awarded Mingyu Card" and won the first prize. According to tax regulations, he pays personal tax at a rate of 20%. How much bonus can Uncle Zhao actually get?
04年赵叔叔购"中邮政卡有奖明雠片"得一等奖奖金0根据税规定他按20%的税率缴个人所税．赵叔叔实际可以获得奖金多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">5_000 - 1_000</gadget>
<output>4_000</output>

<result>4_000</result>