How can you use a number line. tell me how you did it

Tous les départements français sont numérotés et apparaissent sur la plaque d’immatriculation et dans le code postal. quel est ce numéro pour la martinique?

Could anybody translate this into french i would be grateful: imagine being on top of the great wall of china meating all these new people seeing how the locals live.and how's your holiday going in frence? i hope everything is fine,see you soon.

Sac est sur la chaise? (your formal)