Here's another example.
Suppose you want to pivot the bot clockwise around the front right wheel (see sketch) at 90 degrees per second.
Trackwidth = W = 22/12 ft. Wheelbase = L = 26/12 ft.
Code:
ω = π/2 rad/sec
FWD = ω∙(W/2) ft/sec
STR = -ω∙(L/2) ft/sec
K = (L+W)/2