Xiaoliang's mother bought 20,000 treasury bonds on January 1 this year. The annual interest rate is 3.14%.
小亮妈妈今年元月1日购买了20000的国债，年利率为3.14%到期是她可获本息多少元．
<gadget id="calculator">3.14 / 100</gadget>
<output>0.0314</output>

<gadget id="calculator">20_000 * 0.0314 * 1</gadget>
<output>628</output>

<gadget id="calculator">20_000 + 628</gadget>
<output>20_628</output>

<result>20_628</result>