Mom deposits 30,000 yuan in the bank for a period of three years with an annual interest rate of 3.69%. How much money can mother get back when it expires? (Interest tax is 20%)
妈妈把30000元钱存入银行，存期为三年，年利率是3.69%．到期时妈妈可以取回多少元？(利息税为20%)
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