A product is first priced at a profit margin of 20%, and then sold at 90% of the price, resulting in a profit of 256 yuan. What is the cost of this product?
一种商品先按20%的利润率定价，然后按定价的90%出售，结果获利256元，这种商品的成本是多少？
<gadget id="calculator">1.08 - 1</gadget>
<output>0.08</output>

<gadget id="calculator">256 / 0.08</gadget>
<output>3_200</output>

<result>3_200</result>