82⋅83⋅85= 8^2\cdot8^3\cdot8^5= 82⋅83⋅85=
All bases are equal and therefore the exponents can be added together.
82⋅83⋅85=810 8^2\cdot8^3\cdot8^5=8^{10} 82⋅83⋅85=810
810 8^{10} 810