Hi, I am not the sharpest tool in the shed and I am trying to get my head around multiple equations in one formula.

example     ( x+x+x)*2  “then” I would like to divide the result by (y) “then” round >up or <down to 0.0 ( 2 Digits)  Can anyone help. I have looked at the Manual but need some guidance. Particularly if you are doing 2,3,4,5 parts. 

Thank you