How do you calculate HD size if

How do you calculate HD size if I know the number of cylinders, the number of heads and the number of sectors.

I.E.
cyl=2112
heads=16
sectors=63
Hard Drive size = 1080 mb

Number of Cylinders
x Number of Heads
x Sectors per Track
x 512 Bytes per Sector
= Total capacity (in Bytes)

thx

You're Welcome. :)