A pharmaceutical manufacturer is trying to estimate how much of product X it can sell in February. For this purpose, he decided to use the exponential smoothing method. For the month of January, the sales figure of product X is foreseen as 20,000 boxes; however, 16,000 boxes were able to be sold in January. Assuming the exponential correction coefficient is 0.7, how many boxes are the estimated sales for product X in February?