certain product is going to be sold at a discount due to the change of season. If it is sold at 25% off the price, it will lose 25 yuan, and if it is sold at 10% off the price, it will earn 20 yuan. How much is the price of this product?
某种商品因换季准备打折出售，如果按定价的七五折出售，将赔25元，而按定价的九折出售，将赚20元，这种商品的定价为多少元？
<gadget id="calculator">20 + 25</gadget>
<output>45</output>

<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(9/10) - (3/4)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">45 / (3/20)</gadget>
<output>300</output>

<result>300</result>