A sum of money was deposited two years ago, with an annual interest rate of 3.75%, and a total of 12,900 yuan will be obtained upon maturity. How much did you save two years ago?
两年前存入一笔钱，年利率是3.75%，到期共得12900元．两年前，存了多少元？
<gadget id="calculator">3.75 / 100</gadget>
<output>0.0375</output>

<gadget id="calculator">0.0375 * 2</gadget>
<output>0.075</output>

<gadget id="calculator">1 + 0.075</gadget>
<output>1.075</output>

<gadget id="calculator">12_900 / 1.075</gadget>
<output>12_000</output>

<result>12_000</result>