What is the equation for fractal dimension?

Question

If 4/3=1.26, what are the numbers "4" and "3" and where do the come from?

Answer 1

fractal dimension = log (number of pieces) / log (magnification)

fractal dimension = log 4 / log 3

fractal dimension ≈ 1.38629436 / 1.09861229

fractal dimension ≈ 1.26185950