There were three gate chambers on each side of the east gate, each with the same measurements, and the gateposts on either side also had the same measurements.
KJV
And the little chambers of the gate eastward [were] three on this side, and three on that side; they three [were] of one measure: and the posts had one measure on this side and on that side.
ASV
And the lodges of the gate eastward were three on this side, and three on that side; they three were of one measure: and the posts had one measure on this side and on that side.