"Unwrap" it in your mind if it helps.
If you need to move 4 revolutions, at .3/rev, and assuming your rotary is a C axis....and the table is moving in X... Then the command will be something like:
G0 X0 Y0 C0
G01 Z-.1 F5. (ASSUMING RELATIVE DEPTH FROM OD AND ARBITRARY FEED
G01 X-1.2 C1440. F5. (C 360X4 POSITIVE ROTATION AND ROTARY ON RHT SIDE OF TABLE
This assumes your control will accept C commands greater than 360...some won't, and be careful, sometimes the C axis will take you literally and simply move back to 0.....there's a big difference between 0 and 360..even though they're the same location!! Depends on your control.
All you have to do is put the tool in the starting position, spec the end X and C(in number of rotations, or fraction thereof), and the control will coordinate the motion. It'll rotate the C while feeding in X...and the result will be profitable magic!