Total wall area 29.15 m²
Window area 0.96 m² (1 pcs)
Door area 1.52 m² (1 pcs)
Wall area including doors an windows 26.67 m²
Perimeter 11 m

Area a one roll 5 m²
Length a canvases 2.8 m
Whole canvases inna a roll 3 pcs
Remaining fram each roll 1.6 m
Number a canvases By 2.8 m ~18 pcs

Need wallpaper rolls Evryting 6 pcs
Leftovers 3.33 m² ar 0.67 roll