A = (0, 0, 2)
a = (2, 1, -2)
b = (1, 2, 0)
s = -0.2 (slider from -5 to 5, step 0.1)
t = -0.5 (slider from -5 to 5, step 0.1)
X: A + (s * a) + (t * b)
e = Plane(A, A + a, A + b)
w: a ⊗ b
n = Vector(A, A + w)