Dajuan is painting a mural on a rectangular wall. The wall is 14.5 feet long and 10 feet wide. So far, his mural covers 60% of the wall. Dajuan will paint the remaining part of the wall over the next four days. He will paint the same amount of the wall, in square feet, on each of those four days. How much of the wall, in square feet, will Dajuan paint on each of the next four days? Explain how you arrived at your answer.