Xiaoli's sister deposits 25% of her monthly salary in the bank, 15% as insurance premium, 20% for stock trading, and the last remaining 800 yuan as living expenses. How much is her monthly salary?
小丽的姐姐将一个月工资的25%存入银行，15%作为保险费，20%用于炒股，最后剩下800元作为生活费，她一个月工资多少元．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/4) - (3/20) - (1/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">800 / (2/5)</gadget>
<output>2_000</output>

<result>2_000</result>