A person deposits 10,000 yuan in the bank, and gets 11,200 yuan after three years of lump-sum deposit and withdrawal (excluding interest tax). Ask the bank what is the annual interest rate.
某人存入银行10000元，整存整取三年后得到11200元，(不计利息税)问银行的年利率是多少．
<gadget id="calculator">11_200 - 10_000</gadget>
<output>1_200</output>

<gadget id="calculator">1_200 / 10_000 / 3</gadget>
<output>1/25 = around 0.04</output>

<result>1/25 = around 0.04</result>