Aunt Wang's family has a three-year national bond of 5,000 yuan with an annual interest rate of 4.25%. How much interest can Aunt Wang get after the maturity date?
王阿姨家有三年期的国债5000元，年利率4.25%．到期后王阿姨能得到多少钱的利息？
<gadget id="calculator">4.25 / 100</gadget>
<output>0.0425</output>

<gadget id="calculator">5_000 * 0.0425 * 3</gadget>
<output>637.5</output>

<result>637.5</result>