Math
posted by Tyler .
(21 x 3)  18/2 x (9 x 4)
I know to do the parenthesis first.
so it would be 63  18/2 X 36.
do I do the 18 divided by 2 next than times the 36 or do i take 9 (the 18/2) X 36?

do the 18/2 next, then the multiply, then the add.