Junjun's father bought 30,000 yuan of three-year government bonds with an annual interest rate of 4.7%. How much interest will he get after maturity?
军军的爸爸购得年利率为4.7%的三年期国债30000元，到期后，他可得利息多少元？
<gadget id="calculator">4.7 / 100</gadget>
<output>0.047</output>

<gadget id="calculator">30_000 * 0.047 * 3</gadget>
<output>4_230</output>

<result>4_230</result>