Since March 1, 2008, the personal income tax standard has been changed from 1,600 yuan to 2,000 yuan, that is, the part of the income exceeding 2,000 yuan but less than 500 yuan shall be subject to personal income tax at 5%. Mr. Li's monthly salary is 2300 yuan, so how much is his monthly personal income tax payment?
自2008年3月1起，个人所得税标准由1600元改为2000元，即收入超过2000元的部分但少于500元应按5%缴纳个人所得税．李老师每月工资2300元，那么他每月缴纳个人所得税多少元．
<gadget id="calculator">2_300 - 2_000</gadget>
<output>300</output>

<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">300 * (1/20)</gadget>
<output>15</output>

<result>15</result>