How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 1/12100.0*Chance in playoffs100.0*Average seed
Treviso 0 Gloucester 41 -2.4
-0.8
Harlequins 18 Edinburgh 23 -0.5
Grenoble 31 Newcastle 27 +0.2
+0.2
Bristol 22 Bath 57 -0.1
+0.0
Bayonne 14 La Rochelle 24 +0.0
Dragons 34 Enisey 10 -0.0
Pau 21 Cardiff 22 +0.0
Brive 17 Worcester 14 +0.0
If winner is:HomeDrawAway
Ospreys vs Lyon+0.0-0.1-0.1
If winner is:HomeDrawAway
Week of 1/19100.0*Chance in playoffs100.0*Average seed
La Rochelle vs TrevisoOutOut+0.6
-0.3+0.1+1.5
Lyon vs Grenoble-0.0*+0.0+0.1
Cardiff vs Bristol+0.0-0.1-0.1
Newcastle vs Ospreys-0.1-0.1+0.0
Bath vs Pau+0.0-0.3-0.3
Edinburgh vs Saracens+0.0-0.0-0.1
Worcester vs Enisey-0.0-0.1+0.0
Gloucester vs Bayonne+0.0-0.3-0.3

* A starred number could be exactly 0 or just really small. The simulation did not run long enough to know.

What If

Chances based on how well the Treviso finish out the regular season.   Explain

100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-Lplayoffs1234567891011121314151617181920Count
121-0-00.7%0012323481625241202,945,032
100-1-0Out00172642230132,276
80-0-1Out000041735403115,866,852
Total:0.1%00000001261833363118,944,160
Games Above .500
Chance Will Make Playoffs