hight_first, hight_second = 3.5, 4
lenght_first, lenght_second = 50, 60
square_tree = 3 * 2 * 0.25
square_first = hight_first * lenght_first
square_second = hight_second * lenght_second 

how_trees = (square_first + square_second) // square_tree
print(how_trees)
str.__dict__