I am oversimplifying i know.......but this is the correct direction.........the true answer is more complicated...........18 across.......in the horizontal direction.......7 down..............18 + 7 = 25.....iron......fractal patterns...

118 overall......the true number is not exact....man made elements........1 + 1/2 + 1/3.....the fundamental and 18........18281828 in e..