The calculated distance (air line) between Klyetsk and Svyetlahorsk is approximately 133 miles respectively 214 kilometers.
By car or train, the actual journey to Svyetlahorsk is certainly longer, as only the direct route (as the crow flies) between Klyetsk and Svyetlahorsk has been calculated here.
Air line (approximately)
214 kilometers
115 nautical miles