Uncle Wang deposited 3,000 yuan in the bank, with an annual interest rate of 4.25%, and received a total of 3,382.5 yuan when it matured. How many years has Uncle Wang deposited it?
王叔叔在银行存了3000元，年利率是4.25%，到期时一共取回3382.5元，王叔叔存了多少年．
<gadget id="calculator">3_382.5 - 3_000</gadget>
<output>382.5</output>

<gadget id="calculator">4.25 / 100</gadget>
<output>0.0425</output>

<gadget id="calculator">3_000 * 0.0425</gadget>
<output>127.5</output>

<gadget id="calculator">382.5 / 127.5</gadget>
<output>3</output>

<result>3</result>