
A short explanation in English:
Division and multiplication have the same priority, so you solve them from left to right. If someone reads it as 16 รท (2ร8) without parentheses, they would get 1, but to mean that, the parentheses must be written clearly.
16 รท 2 ร 8 goes from left to right.
16 รท 2 = 8
8 ร 8 = 64
So the final answer is 64.