Jackie Chan earns 100,000 yuan from a performance, and must pay personal income tax at 20% according to regulations. How much personal income tax should Jackie Chan pay for this performance?
成龙一次演出收入10万元，按规定必须按20%缴纳个人所得税．成龙这次演出应缴纳个人所得税多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">10 * (1/5)</gadget>
<output>2</output>

<result>2</result>