Last year's Children's Day, the sixth grade students donated 2,200 yuan, depositing the money in the bank for one year, and donating the interest to students from poor families. If the annual interest rate is 2.25%, how much can they donate to this year's June 1st?
去年"六一"儿童节时，六年级同学捐款2200元，将钱存入银行定期一年，到期后将利息捐给家庭贫困的学生．如果年利率是2.25%，到今年的六一，他们可以捐款多少元？
<gadget id="calculator">2.25 / 100</gadget>
<output>0.0225</output>

<gadget id="calculator">2_200 * 0.0225 * 1</gadget>
<output>49.5</output>

<result>49.5</result>