To me, ten by six, even old imperial inches, seems small for a tile. It may be approximately the visible area but bear in mind a tile is well over twice its visible size when fitted, due to the considerable overlapping. I think he probably meant and area comprising ten tiles by six, i.e. 60 tiles.
You would be surprised to find how many people cannot multiply by ten. I've seen people get out a pocket calculator to do it.
To me, ten by six, even old imperial inches, seems small for a tile. It may be approximately the visible area but bear in mind a tile is well over twice its visible size when fitted, due to the considerable overlapping. I think he probably meant and area comprising ten tiles by six, i.e. 60 tiles.
You would be surprised to find how many people cannot multiply by ten. I've seen people get out a pocket calculator to do it.
