The calculated distance (air line) between Nay Pyi Taw and Myaydo is approximately 65 miles respectively 105 kilometers.
By car or train, the actual journey to Myaydo is certainly longer, as only the direct route (as the crow flies) between Nay Pyi Taw and Myaydo has been calculated here.
Air line (approximately)
105 kilometers
56 nautical miles