info from card (1 Viewer)

[misucu99]

I have this magnetic card returning ;1234567? (tracks separators) and I only need the numeric value.
I presume that "mid" will do, but ... how?
I want to have the numeric value returned in the same cell (from a form) after swiping this card with ASCII on.

thank you,
m

P.S. I'm a beginner !