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That would be 2√2 or √8 houses.
What am I missing here?
2 units (in this case houses) down and 2 across (a perhaps intentional misinterpretation of the original slightly ambiguous statement). Reasonable to assume down and across are perpendicular directions. Let's pretend space-time is Euclidean. How far away is the listener from the sneeze? Pythagoras, our faithful companion, guides our understanding...√(2²+2²)=√8=2√2
this is a european old city, so definitely a non-euclidian space.