feed convertion

in my ini i have MAX_LINEAR_VELOCITY = 0.335.
how can i convert this to IMP? or a better question;
can i convert the ini info to be use by hal pins ?
i want to use the motion.current-vel pin(or another) to display velocity(feed)
and it shows the velocity but by 0.335. not 20 IMP.
i've read around the forum but only saw a couple of places
that is may not be possible because hal doesn't take formulas[ ]

Thanks,
Kenneth

found below in docs but can't get pass arrow.

Load the realtime components.

loadrt ddt count=1
loadrt mult2 count =1
loadrt abs count=1

Add the functions to a thread so it will get updated.

addf ddt.0 servo-thread
addf mult2.0 servo-thread
addf abs.0 servo-thread

Make the connections.

setp mult2.in1 60 <

---

pin "mult2.in1" not found. changed it to mult2.in0 but same error
net xpos-cmd ddt.0.in
net X-IPS mult2.0.in0 <= ddt.0.out
net X-ABS abs.0.in <= mult2.0.out
net X-IPM abs.0.out


www.linuxcnc.org/docview/html/hal_hal-examples.html

got it to work by adding mult2.0.in0 point 0
but i can only do one axis?
i mean i have to do this for the three axis ?
was looking for a combined feed rate.