Xiaoli deposits a sum of money in the bank for two years on a fixed-term basis, with an annual interest rate of 2.79%. When it expires, Xiaoli can withdraw 527.9 yuan. How much does Xiaoli save?
小丽将一笔钱存入银行，存两年定期，年利率为2.79%，到期时小丽可取出527.9元，小丽存了多少元．
<gadget id="calculator">2.79 / 100</gadget>
<output>0.0279</output>

<gadget id="calculator">0.0279 * 2</gadget>
<output>0.0558</output>

<gadget id="calculator">1 + 0.0558</gadget>
<output>1.0558</output>

<gadget id="calculator">527.9 / 1.0558</gadget>
<output>500</output>

<result>500</result>