Question

Rearrange for g
K = 2π / √g

Answer 1

K = 2π / √g

Multiply both sides by √g

K √g = 2 π

Divide both sides by K

√g = 2 π / K

Raise both sides to the power of two.

g = ( 2 π )² / K²

g = 4 π² / K²