The calculated distance (air line) between Hantsavichy and Svyetlahorsk is approximately 139 miles respectively 223 kilometers.
By car or train, the actual journey to Svyetlahorsk is certainly longer, as only the direct route (as the crow flies) between Hantsavichy and Svyetlahorsk has been calculated here.
Air line (approximately)
223 kilometers
121 nautical miles