A TV set is first priced at 20% profit, and then sold at 90% of the price, resulting in a profit of 256 yuan. How much is the purchase price of this TV?
一款电视机，先按20%的利润定价，然后按定价的90%出售，结果获利256元．这款电视机的进货价是多少元？
<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>