136x32x100 - the gap between the boards
You need to know the width (in metres) of the decking. Then Linear (or lineal) Metres * Width = Square metres so Linear Metres = Square Metrage / Width
The answer will depend on the width of the decking boards.
The area of a rectangular deck is found by multiplying it's width and length. In this case, a 5.4 by 4 meter deck would require 21.6 square meters of material to cover. ------ The above is true but you asked about how many linear meters of decking you would need to cover this area. To answer this you would need to give us width dimension of the decking planks that you were thinking of using.
Lineal metres = Square metres/Width of the boards.
The answer depends on the width of the decking.
A roofing square is 100 square feet of materials.
144 square meters
meters times meters = square meters
About 14 square meters. (13.935456 square meters)
718 square feet = about 66.7 square meters. (66.7043827 square meters)
139.426 square meters.
About 0.84 square meters (0.83612736 square meters)