Binary to Analog Decimal using Double-Dabble

[Frontrider]

There is a way to convert hex directly to decimal but it involves multiplying powers of 16 by the amount of each digit... I haven't quite figured out a good way to do that yet.

Theres must be some cheaty way to bypass it. I think i might got somewhat closer, but its also could be a dead end.
I'm trying octal to decimal, since that way i can have a gap to use.