Dad deposits 1,000 yuan in the bank for one year on a regular basis, with an annual interest rate of 2.25%. After the maturity date, how much interest will he deserve (interest tax is exempted).
爸爸将1000元存入银行，定期一年，年利率是2.25%，到期后，他应得的利息多少元(免征利息税)．
<gadget id="calculator">2.25 / 100</gadget>
<output>0.0225</output>

<gadget id="calculator">1_000 * 0.0225 * 1</gadget>
<output>22.5</output>

<result>22.5</result>