The annual interest rate of the three-year treasury bill is 2.4%. Dad bought a treasury bill of 2,000 yuan. How much is the principal and interest at maturity?
三年期国库券的年利率是2.4%，爸爸购买了国库券2000元，到期本息共多少元．
<gadget id="calculator">2.4 / 100</gadget>
<output>0.024</output>

<gadget id="calculator">2_000 * 0.024 * 3</gadget>
<output>144</output>

<gadget id="calculator">2_000 + 144</gadget>
<output>2_144</output>

<result>2_144</result>