Xiaohong's father deposited 50,000 yuan in the bank for two years on a regular basis. After the expiration, it is planned to donate the interest to Hope Project. How much does Dad plan to donate? (Exemption of interest tax, fixed deposit annual interest rate: 3.5% for one year; 4.4% for two years; 5.0% for three years)
小红的爸爸将5万元存入银行，定期两年．到期后计划将利息捐给希望工程．爸爸计划捐款多少元？(免征利息税，定期存款年利率：一年期3.5%；二年期4.4%；三年期5.0%)
<gadget id="calculator">5 * 10_000</gadget>
<output>50_000</output>

<gadget id="calculator">4.4 / 100</gadget>
<output>0.044</output>

<gadget id="calculator">50_000 * 0.044 * 2</gadget>
<output>4_400</output>

<result>4_400</result>