The original price of a product is 1,800 yuan, but the price is first reduced by 10%, and then the price is increased by 10%, is it still 1,800 yuan? If not then is it a loss or a profit?
一件商品原价1800元，先降价10%，再提价10%出售，还是1800元吗？如果不是那么是亏本还是盈利了呢？
<result>1_800</result>