16²⋅4³ : 8⁴ = (2⁴)²⋅(2²)³ : (2³)⁴ = 2⁸⋅2⁶ : 2¹² = 2^(8+6) : 2¹² = 2¹⁴ : 2¹² = 2^(14-12) = 2² = 4
Ответ: 4