5300 feet
The measurement of 1615 itself is not specified, but if it refers to square feet, then it is simply 1615 square feet. If you mean something else, please provide more context for a specific answer.
no M stands for meters
how many feet are in 3.98 meters
600 feet = 182.88 meters
20 feet = 6.096 meters
7.6 feet = 2.31648 meters.
5,280 feet = 1,609.344 meters
90 feet is 27.43 meters.
14,440 feet is 4,401.3 meters.
7500 feet = 2286 meters.
3.78 Meters = 12.4 Feet