certain brand of bicycles is now on sale at a 15% discount. Uncle Wang bought a bicycle and paid 357 yuan. How much did you pay for this bicycle?
某种品牌自行车现在打八五折出售，王叔叔买一辆自行车，付了357元．原来买这辆自行车应付多少元？
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">357 / (17/20)</gadget>
<output>420</output>

<result>420</result>