A businessman marked a piece of clothing at 650 yuan, but after being identified by anti-counterfeiting personnel, it was reduced to 78 yuan and sold, but he could still earn 20%.
一个商人把一件衣服标价650元，经打假人员鉴别降至78元出售，但仍可以赚20%，如按原价出售，则这件衣服可获暴利多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">78 / (6/5)</gadget>
<output>65</output>

<gadget id="calculator">650 - 65</gadget>
<output>585</output>

<result>585</result>