Dad saved a sum of education savings last year. After the maturity this year, he got a total of 3116.1 yuan in principal and interest. The bank clerk told him that the annual interest rate of education savings is 3.87%. Do you know how much money Dad deposited in the bank?
爸爸去年存了一笔教育储蓄，今年到期后得到本金和利息共3116.1元，银行营业员告诉他教育储蓄的年利率是3.87%．你知道爸爸存人银行多少钱吗？
<gadget id="calculator">3.87 / 100</gadget>
<output>0.0387</output>

<gadget id="calculator">0.0387 * 1</gadget>
<output>0.0387</output>

<gadget id="calculator">1 + 0.0387</gadget>
<output>1.0387</output>

<gadget id="calculator">3_116.1 / 1.0387</gadget>
<output>3_000</output>

<result>3_000</result>