Uncle Zhang's taxable income last month was 450 yuan. If he pays personal income tax at a rate of 3%, how much should he pay?
张叔叔上个月的应纳税所得额是450元，如果按3%的税率缴纳个人所得税，应缴纳多少元．
<gadget id="calculator">3 / 100</gadget>
<output>3/100 = around 0.03</output>

<gadget id="calculator">450 * (3/100)</gadget>
<output>27/2 = around 13.5</output>

<result>27/2 = around 13.5</result>