The Municipal Women's Federation deposited 1 million from UNICEF in the bank, and used the interest of this fund to subsidize disabled children every year. If the annual interest of the bank fixed deposit is 2.25%, after deducting the 20% interest tax, how much money can the foundation use to subsidize disabled children each year?
市妇联把儿童基金会的100万存入银行，每年用这笔基金的利息资助残疾儿童．如果银行定期存款一年的利息为2.25%，扣除20%的利息税后，基金会每年可用多少元钱资助残疾儿童．
<gadget id="calculator">100 * 10_000</gadget>
<output>1_000_000</output>

<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">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1_000_000 * 0.0225 * 1 * (4/5)</gadget>
<output>18_000</output>

<result>18_000</result>