Evaluate: (0.8 × 0.8 × 0.8) + (0.5 × 0.5 × 0.5)/(0.8 × 0.8) − (0.8 × 0.5) + (0.5 × 0.5)

Given, Using the formula, (a3 + b3) = (a + b)(a2 - ab + b2) Hence, = 1.3.