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
Grenoble 31 Newcastle 27 -10.1
-2.0
Harlequins 18 Edinburgh 23 -1.8
-0.1
Treviso 0 Gloucester 41 -0.7
Bristol 22 Bath 57 -0.3
+0.0
Pau 21 Cardiff 22 -0.1
Dragons 34 Enisey 10 -0.1
If winner is:HomeDrawAway
Ospreys vs Lyon+0.1*-0.1-0.4
+0.0-0.1-0.1
Saracens vs Stade Français+0.2+0.2-0.0
+0.2+0.0-0.0
If winner is:HomeDrawAway
Week of 1/19100.0*Chance in playoffs100.0*Average seed
Newcastle vs Ospreys+7.1OutOut
+1.8+0.5-0.5
Edinburgh vs Saracens-0.0+0.4+0.7
-0.0+0.0+0.1
Cardiff vs Bristol-0.1+0.5+0.4
+0.0-0.0-0.2
La Rochelle vs Treviso-0.1*-0.0+0.4
+0.0-0.0-0.1
Lyon vs Grenoble-0.1+0.3+0.4
-0.0+0.0+0.1
Gloucester vs Bayonne-0.0*-0.0+0.4
+0.0-0.0-0.2
Stade Français vs Harlequins-0.1*+0.0+0.1
-0.1-0.1+0.1
Bath vs Pau+0.0-0.1-0.2
Brive vs Dragons-0.1-0.2+0.1
Worcester vs Enisey-0.0-0.3+0.0

* 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 Newcastle finish out the regular season.   Explain

100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-Lplayoffs1234567891011121314151617181920Count
121-0-08.8%026810132026141003,720,299
100-1-0Out04224428200132,503
80-0-1Out002132928135540015,091,358
Total:1.7%001224142925114430018,944,160
Games Above .500
Chance Will Make Playoffs