A 500 yuan remuneration, according to regulations need to pay 3% personal income tax, how much is the tax.
一笔500元的稿酬，按规定需要交纳3%的个人所得税，税款是多少元．
<gadget id="calculator">3 / 100</gadget>
<output>3/100 = around 0.03</output>

<gadget id="calculator">500 * (3/100)</gadget>
<output>15</output>

<result>15</result>