Xiao Ming deposits 800 yuan of lucky money in the bank for three years, and the annual interest rate is 3.24%.
小明把800元压岁钱存在银行三年，年利率是3.24%，到期时有多少元钱的利息．
<gadget id="calculator">3.24 / 100</gadget>
<output>0.0324</output>

<gadget id="calculator">800 * 0.0324 * 3</gadget>
<output>77.76</output>

<result>77.76</result>