The calculated distance (air line) between Hwaseong-si and Gapyeong is approximately 57 miles respectively 93 kilometers.
By car or train, the actual journey to Gapyeong is certainly longer, as only the direct route (as the crow flies) between Hwaseong-si and Gapyeong has been calculated here.
Air line (approximately)
93 kilometers
50 nautical miles