When the film was first submitted by Fox in 1980 at 9564 (feet + frames) it was at 24fps because it's film. Every 90 feet equals 1 minute of film so uncut this would be 106.266666666 [9564 รท 90]. Then convert the end into seconds:[.266666666 x 60] = 15.9999. So, 106m 16s. As submitted, it was 106m 15s, a difference of 1 second (approx.). All the video releases are 25fps (PAL) and require you to add 4% to get the proper number. Arrow's uncut 102m 16s when 4% is added comes to 106m 17s (rounded). The 4% is approx.
Also, it was reported that Inferno was released in France on 16Apr80 @ 110 min. but there is no other evidence of that. Could be just a misprint of 101.
Edited above to correct my math
