Yuan Yuan's family saved 5,000 yuan in education savings the year before, and withdrawn it two years later, getting a total of 5,450 yuan in principal and interest. What is the annual interest rate?
元元家前年存教育储蓄5000元，两年后取出，得到本金和利息共5450元．每年的利率是多少？
<gadget id="calculator">5_450 - 5_000</gadget>
<output>450</output>

<gadget id="calculator">5_000 * 2</gadget>
<output>10_000</output>

<gadget id="calculator">450 / 10_000</gadget>
<output>9/200 = around 0.045</output>

<result>9/200 = around 0.045</result>