The calculated distance (air line) between Jemeppe-sur-Meuse and Saint-Gilles is approximately 53 miles respectively 85 kilometers.
By car or train, the actual journey to Saint-Gilles is certainly longer, as only the direct route (as the crow flies) between Jemeppe-sur-Meuse and Saint-Gilles has been calculated here.
Air line (approximately)
85 kilometers
46 nautical miles