Huanhuan and Lele have the same monthly salary, Huanhuan saves 30% per month, Lele’s monthly expenses are 10% more than Huanhuan’s, and the rest is deposited in the bank for 1 year (12 months), Huanhuan saves more than Lele I paid 5,880 yuan, what is the monthly salary of Qiu Huanhuan and Lele?
欢欢与乐乐月工资相同，欢欢每月存30%，乐乐月开支比欢欢多10%，剩下的存入银行1年(12个月)后，欢欢比乐乐多存了5880元，求欢欢、乐乐月工资为多少？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">(7/10) * (11/10)</gadget>
<output>77/100 = around 0.77</output>

<gadget id="calculator">1 - (77/100)</gadget>
<output>23/100 = around 0.23</output>

<gadget id="calculator">(3/10) - (23/100)</gadget>
<output>7/100 = around 0.07</output>

<gadget id="calculator">5_880 / 12 / (7/100)</gadget>
<output>7_000</output>

<result>7_000</result>