Lao Li used 5,000 yuan to buy two-year treasury bonds with an annual interest rate of 4.51%. After the maturity, he gave the interest to his grandson as "New Year's money". How much yuan did he give to his grandson. (Treasury bills do not pay interest tax)
老李用5000元买了两年期国库券，年利率为4.51%，到期后，他把利息作为"压岁钱"给了孙子，他给了孙子多少元．(国库券不缴利息税)
<gadget id="calculator">4.51 / 100</gadget>
<output>0.0451</output>

<gadget id="calculator">5_000 * 0.0451 * 2</gadget>
<output>451</output>

<result>451</result>