Aunt Wang bought 8,000 yuan of treasury bonds in 2007, with a term of three years. The annual interest rate of the three-year treasury bond is 5.74%. Since buying the treasury bond can avoid paying the 5% interest tax, how much can Aunt Wang be exempted from paying the interest tax?
王阿姨2007年买了8000元国债，定期三年．三年国债的年利率为5.74%，由于买国债可以免交5%的利息税，王阿姨可以免交利息税是多少元．
<gadget id="calculator">5.74 / 100</gadget>
<output>0.0574</output>

<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">8_000 * 0.0574 * 3 * (1/20)</gadget>
<output>68.88</output>

<result>68.88</result>