Just spitballing ideas here. After a few levels you could unlock a positioning board which lets you turn a number into a fraction if you put it on in the lower slot or a power in the upper slot would be good. Instead of a +2 you could turn it into /2 or ^2. Then maybe an inversion sigil that turns a + into a -, a / into a x and a ^ into a √
That way you're not grinding away at numbers to get to the division, and you'll unlock roots and powers to boot. I dunno, but I agree it's a slog to get to the x3 and /2 every time you need them