A soccer game is 90 minutes with m minutes of stoppage time the total time is 90+m. How long is the game with 12 minutes stoppage time?

If the game is 90 minutes with m minutes of stoppage time, then the total time is 90+m.

Therefore, if there is 12 minutes of stoppage time, the total time of the game is 90+12 = <<90+12=102>>102 minutes. Answer: \boxed{102}.