Xiaohong deposits 3,000 yuan in the bank for a fixed period of three years. When the maturity expires, Xiaohong will get an interest of 45 yuan. What is the interest rate for a fixed period of three years?
小红把3000元钱存入银行，定期三年，到期时小红得到的利息是45元，定期三年的利率是多少？
<gadget id="calculator">3_000 * 3</gadget>
<output>9_000</output>

<gadget id="calculator">45 / 9_000</gadget>
<output>1/200 = around 0.005</output>

<result>1/200 = around 0.005</result>