Since March 1, 2007, the state has adjusted the personal income tax. According to regulations: the part of the monthly personal income exceeding 2,000 yuan shall be subject to personal income tax at a rate of 5%. Wang Fang's mother paid personal income tax of 30 yuan last month. How much did Wang Fang's mother earn last month?
自2007年3月1日起，国家对个人所得税进行了调整．按照规定：每月个人收入超过2000元的部分，应按5%的税率缴纳个人所得税．王芳的妈妈上个月缴纳个人所得税30元．王芳妈妈上个月收入多少元？
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">30 / (1/20)</gadget>
<output>600</output>

<gadget id="calculator">2_000 + 600</gadget>
<output>2_600</output>

<result>2_600</result>