For a commodity, if the price is increased by 10% based on the current price, the profit will be 200 yuan, and if it is sold at a 40% discount, the loss will be 200 yuan. How much is the cost of this item.
一件商品，如果在现有价格础上提价10%，则会盈利200元，如果按照六折出售，则亏损200元．这件商品的成本是多少元．
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">800 * (3/5)</gadget>
<output>480</output>

<gadget id="calculator">480 + 200</gadget>
<output>680</output>

<result>680</result>