Mom took out the two-year lump sum deposit that was due, and got an interest of 525 yuan, with an annual interest rate of 3.75%. How much money did mom save at that time?
妈妈将到期的整存整取两年的钱取出来，得到利息525元，年利率为3.75%，妈妈当时存了多少钱？
<gadget id="calculator">3.75 / 100</gadget>
<output>0.0375</output>

<gadget id="calculator">525 / 2 / 0.0375</gadget>
<output>7_000</output>

<result>7_000</result>