The simplification of \(\frac{{0.04\: \times \:0.04\: \times\:0.04 - 0.04\: \times\:0.03\: \times\:0.02}}{{0.08\: \times \:0.08\: +\:0.06\: \times \:0.02\: + \:0.04\: \times \:0.06}}\)