3,000 yuan is deposited in the bank with an annual interest rate of 2.25%. After maturity, the interest and principal will total 3,270 yuan. How many years has it been deposited?
3000元存入银行，年利率是2.25%，到期后利息和本金共3270元，存了多少年？
<gadget id="calculator">3_270 - 3_000</gadget>
<output>270</output>

<gadget id="calculator">2.25 / 100</gadget>
<output>0.0225</output>

<gadget id="calculator">270 / 3_000 / 0.0225</gadget>
<output>4</output>

<result>4</result>