Dongdong deposits 500 yuan of New Year's money in the bank, and the annual interest rate is 2.2%, and the two-year lump sum deposit and withdrawal, how much interest can Dongdong get.
冬冬把500元压岁钱存在银行，按年利率2.2%算，两年期整存整取，冬冬能得多少利息．
<gadget id="calculator">2.2 / 100</gadget>
<output>0.022</output>

<gadget id="calculator">500 * 0.022 * 2</gadget>
<output>22</output>

<result>22</result>