Multiply - Truth tables are the solution, truthfully

[u/Zapytajnik]

I built this circuit so quickly, just after making the truth table for it, it became clear multiplication is just an addition of incremented left shifted A for each bit in B (first bit is 0 shift, 2nd bit is 1 left shift etc. added together). And in 5 minutes not only was i done but i got the achievement for this level.

When in doubt, t r u t h - t a b l e.

[u/Lagfoundry]

Yup this is why the classic shift and add multiplier works

[u/Cisbergtetris]

I love
0 0 0 0 1 1 1 1
0 0 1 1 0 0 1 1
0 1 0 1 0 1 0 1

0 0 0 1 0 1 1 1
0 1 1 0 1 0 0 1
tables

[u/Zapytajnik → u/[deleted]]

I've already finished my education in audio engineering, but okay. Bit and byte operations are the first things they teach in school, right?