A person deposits 25,000 yuan in a bank, and after 3 years deducting 20% interest tax, he gets 26,200 yuan. What is the annual interest rate of this bank?
某人将25000元存入银行，3年后扣除20%的利息税得到26200元，问这家银行的年利率是多少？
<gadget id="calculator">26_200 - 25_000</gadget>
<output>1_200</output>

<gadget id="calculator">25_000 * 3</gadget>
<output>75_000</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">25_000 * 3 * (1/5)</gadget>
<output>15_000</output>

<gadget id="calculator">75_000 - 15_000</gadget>
<output>60_000</output>

<gadget id="calculator">1_200 / 60_000</gadget>
<output>1/50 = around 0.02</output>

<result>1/50 = around 0.02</result>