Yeah, accidentally a unit/decimal place. Oopsies. To the recalc mobile:
Units are given in feet. Charitably lets assume everything is about 4m high. The larger rooms are then 4m x 4m x 3m, more or less. So we have
4*3 *(2) + 4*4 *(4) = 24 + 64 = 88 m^2 of coverage to get to.
Generous: Say 10 rooms. = 880 m^2 of coverage.
Edit:
Super pessimistic: Say 30 rooms. 2,640.
Assume 1 m^3 block of granite. Lets make it 25 times less thick in one direction. 10cm thick in this direction is about 3 inches. Super thick slab still. What does this do to the dimensionality? Lets say we
Length = x
Width=x
Thickness=0.04m = 4cm ~1.5 inches
Want the volume the same.
Solve 0.04x^2 = 1
x^2= 100/4 = 25
x= 5
So each of these sheets has x^2=25 surface area it covers
So one of these (square in this case but it doesnt matter) blocks that are >1.5 inches thick cover 25 m^2 surface area.
Generous case: Takes ~40 of these to do the trick (aportioned into pieces perhaps of varying size)
Super pessimism case: Takes ~120 of these to do the trick (apportioned into pieces perhaps of varying sizes)
Also:
Blah blah blah we're tessalating a prebuilt structure so we can't actually spread surface area out like you're doing here off the back of the napkin.
Yeah, I know but this seems a middling concern. We do everything room by room and lash those together.
Tl;dr:
Note we don't have enough 5SB sets to do each room individually anyway
Its unfeasible to 5SB literally every room.It would take either a ridiculous amount of paint or too many storage scrolls. (I think 40 is a bit much, 120 is way too much).
And waaaay too many sets of 5SB.
1)We can easily do a few rooms, strategically speaking.
2)We can easily do the outside walls (should be less of everything by a factor of 4).
We can probably do both (1) and (2)