The state stipulates that interest tax is levied on savings deposits, and the interest tax rate is 20%. Xiaohong deposits RMB 2,000 in the bank, and the annual interest rate is 2.25% for one year. When the deposit matures, how much interest tax should Xiaohong pay?
国家规定储蓄存款需征收利息税，利息税的税率为20%，小红在银行存入人民币2000元，定期一年年利息为2.25%，存款到期时，小红应交利息税多少元？
<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">2_000 * 0.0225 * 1 * (1/5)</gadget>
<output>9</output>

<result>9</result>