Xiao Li deposits 5,000 yuan in the bank for one year, with an annual interest rate of 2.25%. After one year, he withdraws the interest (deducting 20% interest tax) and donates it to Hope Primary School. How much can he donate?
小李在银行存一年期储蓄5000元，年利率为2.25%，一年后将利息(扣除20%利息税)取出捐给希望小学．他可以捐多少元．
<gadget id="calculator">2.25 / 100</gadget>
<output>0.0225</output>

<gadget id="calculator">5_000 * 0.0225 * 1</gadget>
<output>112.5</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">112.5 * (4/5)</gadget>
<output>90</output>

<result>90</result>