How many square kilometer in 4046.82 square meter?

Answer 1

One square kilometre measures 1000 m in each direction. i.e. 1 000 000 square metres. The shape may be arbitrary, as it often is in parcels of land.

So your 4046.82 square metres is 4046.82/1 000 000 - about 0.0404, but check the math.