(50G): Exact Integer Division to Integer Base

[Gerald H]

The programme also delivers correct results for negative bases, eg

1
600
-10

:-10: { "." 0 0 -1 "°" 6 -6 }

and

6000000
70
-10

:-10: { 8 -5 7 -1 4 "." "°" -2 8 -5 7 -1 4 }