A set of furniture is priced at 6,500 yuan. After bargaining, the boss is willing to sell it at a 20% discount. How much is it cheaper to buy this set of furniture?
一套家具标价6500元，砍价后，老板愿八折出售．买这套家具便宜了多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">6_500 * (1/5)</gadget>
<output>1_300</output>

<result>1_300</result>