It depends a lot on what the executable does. I don’t know the hello world size, but anecdotally I remember seeing several go binaries in the single digit megabyte range. I know the code size is somewhat larger than one might expect because go keeps some type info around for reflection whether you use it or not.
That is point not a line. An extra 2MB of source is probably a 60MB executable, as you are measuring the runtime size. Two "hello worlds" are 116MB? Who measures executables in Megabits?