And I don’t believe you are multiplying to 12. So I guess that makes two of us. Or 2.000000000000000000 of us if you prefer.
I gave you the exact calculation the way one has to do it when computing with irrational numbers and it gave 12, and even justified the steps with things that are taught in all high-school algebra classes. Your belief or lack thereof is irrelevant to the fact of the matter, which is that without specifying a shape for the blanket the problem is ill-posed, even specifying that the blanket is rectangular the problem remains ill-posed unless one also specifies that the side lengths are rational numbers of units (or better for simplicity integer numbers of units).