Mr. Li deposited a sum of money for three years, with an annual interest rate of 4.75%, and he received an interest of 5,700 yuan when it matured. How much money did he deposit at that time?
李老师将一笔款整存整取三年，年利率是4.75%，到期时他获得利息5700元，他当时存入多少钱？
<gadget id="calculator">4.75 / 100</gadget>
<output>0.0475</output>

<gadget id="calculator">5_700 / 0.0475 / 3</gadget>
<output>40_000</output>

<result>40_000</result>