Xiaoli's family deposited RMB 4,500 in the bank the year before last, and received a total of RMB 4,674.96 in principal and interest two years later. Find the annual interest rate. (no interest tax deducted)
小莉家前年在银行存入人民币4500元，2年后共得本息4674.96元，求年利率．(不用扣利息税)
<gadget id="calculator">4_674.96 - 4_500</gadget>
<output>174.96</output>

<gadget id="calculator">174.96 / 4_500 / 2</gadget>
<output>0.01944</output>

<result>0.01944</result>