Zhang Li bought a kettle at the counter of the discount store, and the kettle was discounted by 15%. The actual cost was 25.5 yuan. How much was the original price of the kettle?
张丽在减价商店柜台买了一个水壶，水壶打八五折，实际花了25.5元，这个水壶原价是多少钱？
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">25.5 / (17/20)</gadget>
<output>30</output>

<result>30</result>