The price of a product is 340 yuan after a 15% price reduction. What is the original price of this product? (solution by equation)
一种商品降价15%后是340元，这种商品的原价是多少元？(用方程解)
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/20)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">340 / (17/20)</gadget>
<output>400</output>

<result>400</result>