Calculating Main pot vs Side pot EV

[ekky]

hi all

I apologise if this has been covered lately, but I couldn't find a relevant thread in the archives, so I come cap in hand to the most reliable forum on the internet for guidance.

blinds 600/1200. player X moves in for 8k... random fool calls for 8k, and has 8k behind. My stack is 30k

(my intention is to re-raise, and build a side pot vs the guy who smooth called with 8k behind)

Now, I figure that my equity in the main pot would be 34.2%
(this is just based on pokerstove)

and my equity in the side pot would be 56.6%

now..this is what I came up with

if I fold.. i obviously have 30k

If i jam, and the other guy calls... I have 14k if i lose

If I win I have 14k + (0.342*25,800) + (0.566*16,000).. which gives me an overall EV of $31,889.20

this is bigger then $30k, so this is a clear call apparently.. but is this the correct calculation? I was thinking maybe you needed to do it a bit different, and work out the overall permutations.. ie

If i call and lose both pots I have x
If I call and win the side pot and the main pot i have x
If I call and lose the main pot I have x
If I call and win both pots I have x

the probability of each x occuring is y, so you multiply each corresponding value of x by their 'y'.. and THAT is the correct way to do it. ( I dont know, maybe this gets the same numbers as the way I did it?!)

I apologise for the simplistic nature of this question, and any comments on this would be really really welcome

kindest regards

Ekky