Aunt Li went to the Computer City to buy a computer, and she fell in love with a new quad-core computer with a price tag of 8,000 yuan. Aunt Li said to the manager, "Can I get a 20% discount?" 5%." In this way, Aunt Li bought this new computer. How much did Aunt Li actually spend on this computer?
李阿姨到电脑城选购电脑，看上了一台标价8000元的四核新款电脑，李阿姨对经理说："打八折行吗？"经理想了想说："你说的价格再加5%吧．"就这样，李阿姨买下了这台新款电脑．李阿姨买下这台电脑实际花了多少钱？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">1 + (1/20)</gadget>
<output>21/20 = around 1.05</output>

<gadget id="calculator">8_000 * (4/5) * (21/20)</gadget>
<output>6_720</output>

<result>6_720</result>