The calculated distance (air line) between Granarolo dell'Emilia e Viadagola and Prato is approximately 50 miles respectively 80 kilometers.
By car or train, the actual journey to Prato is certainly longer, as only the direct route (as the crow flies) between Granarolo dell'Emilia e Viadagola and Prato has been calculated here.
Air line (approximately)
80 kilometers
43 nautical miles