A merchant puts a price of a dress at 200 yuan. After being identified by anti-counterfeiting personnel, it is reduced to 60 yuan for sale, but it can still earn 20%. So what is the cost price of this dress?
一家商家把一件连衣裙标价为200元，经打假人员鉴别，降至60元一件出售，但仍可赚20%，那么这件连衣裙的成本价是多少元．
<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">60 / (6/5)</gadget>
<output>50</output>

<result>50</result>