Calculate the population density of the city as the destination of shipment no.1369.
shipment no. 1369 refers to ship_id = 1369; population density refers to Divide (area, population)
SELECT T2.area / T2.population FROM shipment AS T1 INNER JOIN city AS T2 ON T1.city_id = T2.city_id WHERE T1.ship_id = '1369'