The calculated distance (air line) between Chatou and Paris 13 Gobelins is approximately 10 miles respectively 16 kilometers.
By car or train, the actual journey to Paris 13 Gobelins is certainly longer, as only the direct route (as the crow flies) between Chatou and Paris 13 Gobelins has been calculated here.
Air line (approximately)
16 kilometers
9 nautical miles