Xiaogang bought a coat last year and spent 85 yuan more. This year, he went to the clothing city to see that the coat was sold at 85% of the original price. How much did Xiao Gang spend more on this dress?
小刚去年买了一件上衣多花85元，今年到服装城一看，这件上衣按原价的85%出售，小刚买这件衣服多花了多少钱？
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1 - (17/20)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">85 / (3/20)</gadget>
<output>1_700/3 = around 566.666667</output>

<result>1_700/3 = around 566.666667</result>