The take-off distance of an aircraft is 800m in standard atmosphere, no wind at 0 ft pressure-altitude. Using the following corrections:

± 20 m / 1 000 ft field elevation
5 m / kt headwind
+ 10 m / kt tail wind
± 15 m / % runway slope
± 5 m / ° C deviation from standard temperature

The take-off distance from an airport at 2 000 ft elevation, temperature 21° C, QNH 1013.25 hPa, 2% up-slope, 5 kt tail wind is: