You multiple how ever many layers you have. Like let's say you have 5 layers you would just go 6 times 6 times 6 and so on
Order of operations
PEMDAS
There are no parenthesis
There are no exponents
Now, we do multiplication and division from left to right
(9x9) + 8 - (8/10)
=
81 + 8 - 0.8
Now, we do addition and subtraction from left to right
(81 + 8) - 0.8
89 - 0.8
=
88.2
Here you go :) I sent the work in the picture below
