、。
If you face north, east is on your right.
Literal
North [object-を] face-[when-と], east [topic-は] right-side becomes.
向く ('to face, to turn toward') with を for the direction faced (not に — this is an unusual usage where the direction is marked as an object of turning, emphasizing the action of facing). と marks the immediate conditional — 'when X, then Y.' A simple orientation rule.