Why is a tiny modular house the best way to build for several hundred people? Do they stack, or is the idea that universities in Sweden have acres of space wait

Why is a tiny modular house the best way to build for several hundred people? Do they stack, or is the idea that universities in Sweden have acres of space waiting to put these on? Also, an initial test run of 22 units arranged in blocks of eight, how many blocks of eight does it take to arrange 22 units exactly?