Sitting in traffic, my wife is driving so I did some math.
There are two links for each driver, so we double the pitch and multiply it by the driver count.
3/8 pitch doubled - 3/4” or 0.75” per driver, .404 is 0.808”.
The 3/8 chain for you bar has 98 drivers.
98x0.75”=73.5”
Then divide...