How is that impossible according to topology? Maybe there's some context like "1/3rd of the bits where people live is underwater". Like, my country is roughly

How is that impossible according to topology? Maybe there's some context like "1/3rd of the bits where people live is underwater". Like, my country is roughly the same size as Germany. But the relevant context is "but 90% of our landmass is hills or mountains, so only 10% of our land is actually inhabited" So yeah, 1/3 of what...