Mom got back her salary for January. After half a month, all wages (2/5) are used up, leaving 2130 yuan. How much is mother's salary in January?
妈妈领回一月份工资．半个月后用去全部工资的(2/5)，还剩下2130元．妈妈一月份的工资是多少元？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2_130 / (3/5)</gadget>
<output>3_550</output>

<result>3_550</result>