Li Xiaohua deposits 300 yuan of New Year's money in the bank, and deposits and withdraws for one year. She plans to take out all the money and donate it to the "Hope Project" when it is due. If the annual interest rate is 2.25%, how much can Li Xiaohua donate to "Project Hope" after the maturity date?
李小华把300元压岁钱存入银行，整存整取一年．她准备到期后将钱全部取出捐给"希望工程"．如果按年利率2.25%，到期后李小华可以捐给"希望工程"多少元？
<gadget id="calculator">2.25 / 100</gadget>
<output>0.0225</output>

<gadget id="calculator">300 * 0.0225 * 1</gadget>
<output>6.75</output>

<gadget id="calculator">300 + 6.75</gadget>
<output>306.75</output>

<result>306.75</result>