The calculated distance (air line) between Davyd-Haradok and Mahilyow is approximately 183 miles respectively 294 kilometers.
By car or train, the actual journey to Mahilyow is certainly longer, as only the direct route (as the crow flies) between Davyd-Haradok and Mahilyow has been calculated here.
Air line (approximately)
294 kilometers
159 nautical miles