You can check by comparison the old 'Horia Demian' Sports Hall versus the new Multifunctional Sports Hall's dimensions on the Google Earth caption and on the section overlay here. (the last photos from the album).
As you can see, 'Horia Demian' Sports Hall has 2 stands, 18 rows each. One row having 45m, the total length of all rows is 1620m.
The new Sports Hall has 4 stands, 20 rows each, with an average length of 216m. The toal length would be 4320m.