Xiaoli's mother deposits RMB 5,000 in the bank with a deposit period of one year and an annual interest rate of 2.25%. The bank will withhold and collect 20% of the interest tax when the withdrawal is due. How much is the interest tax paid when it is due?
小丽的妈妈在银行里存入人民币5000元，存期一年，年利率2.25%，取款时由银行代扣代收20%的利息税，到期时，所交的利息税为多少元？
<gadget id="calculator">2.25 / 100</gadget>
<output>0.0225</output>

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

<gadget id="calculator">5_000 * 0.0225 * 1 * (1/5)</gadget>
<output>22.5</output>

<result>22.5</result>