Grandpa Liu deposited the 200,000 yuan he had accumulated in the bank to establish a fund to support poor students. It is fixed for one year, with an annual interest rate of 2.25%, and 20% of the interest tax payable. Interest subsidizes poor students. If each poor student is subsidized 900 yuan per year, how many poor students can be sponsored by Grandpa Liu to complete their studies in a year?
刘爷爷将自己积攒的20万元存入银行，建立一个资助贫困生的基金，定期一年，年利率2.25%，应纳利息税20%，到期后本金自动转存，拿出税后利息资助贫困生，若每位贫困生每年资助900元，刘爷爷一年可资助几名贫困生完成学业？
<gadget id="calculator">20 * 10_000</gadget>
<output>200_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">(4/5) / 900</gadget>
<output>1/1_125 = around 0.000889</output>

<gadget id="calculator">200_000 * 0.0225 * 1 * (1/1_125)</gadget>
<output>4</output>

<result>4</result>