The calculated distance (air line) between Nārāyanganj and Gafargaon is approximately 57 miles respectively 91 kilometers.
By car or train, the actual journey to Gafargaon is certainly longer, as only the direct route (as the crow flies) between Nārāyanganj and Gafargaon has been calculated here.
Air line (approximately)
91 kilometers
49 nautical miles