Your total floor area = 16.86m2
You will require 9 packs which will give you 18m2 - don't worry to much about the excess as this will allow for any off cuts

when working out square meterage/foot, best way to remember it is length x width, so you ll go 14ft x 13ft = 182 ft, which converted into metres is 16.9 m2, so if a pack contains 2 m2, you ll need 9 packs and that will allow for cuts and wastage,

The area is 14to 13 feet 18.4m2 + 10% waste you need 22.m2 11boxes

Hi your total meterage is 3.96m x 4.27m = 16.91m2 then add 10% for cuts, so you will need 10 x packs, plus if a mistake is made your covered.