Training Man Hour

Hello friends,
I do have some confusion we have done 12 no. training secessions, 120 persons, 12 hours . What will be the TMH.
12 hours x 120 workes = 1440 hrs
or
120 hrs ???
because if in each secession if we train 10 person one hour it will be = 1x10 =10
in 12 secessions = 10 x 12 = 120 Hrs
Which is correct ??
Please revert ???

Training Man hours ( for industry) - 120 Man x 12 Hrs. - 1440 hrs.
Training Man days = 1440 / 8 = 180 days
The same may deviate for the training providers as 120Hrs.
Regards
L S Thamarai kannan