Congcong's mother bought 20,000 yuan in treasury bonds, fixed for 5 years, with an annual interest rate of 6.15%. How much money can Congcong's mother get back from the bank after the maturity date?
聪聪的妈妈买了2万元的国库券，定期5年，年利率是6.15%．到期后，聪聪的妈妈可以从银行取回多少钱？
<result>6_150</result>