Mom buys a dress with a 15% discount in the store and pays 170 yuan. What is the original price of this dress?
妈妈在商店购买一件打八五折的衣服，付款170元，这件衣服原价多少元．
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">170 / (17/20)</gadget>
<output>200</output>

<result>200</result>