Haha ya same here ... I'll give it a shot but no guarentees

Equation:

(Kw)/(Ln) = (Nw)/(Lr)

[L^2r] (Kw)/(Ln) = (Nw)/(Lr) [L^2r]

gives us

(L^2Krw)/(L^3nr) = LNw

(L^2Krw)/L^3nr)/ [Nw] = (LNw)/ [Nw]

gives us

Kr/Lwr = L

Not sure if something can be given in terms of L with L being on both sides ... but that is the best I got for ya =D