Area calculation is invalid

[Stenver Jerkku]

So for some reason when I try to calculate a polygon area, the results are extremely small.

> factory = RGeo::Geographic.projected_factory(projection_proj4: "+proj=utm +datum=WGS84 +zone=32T")

> RGeo::GeoJSON.decode(geometry, geo_factory: factory.projection_factory).area

1.7460196668357376e-05

Here is what the geometry looks like - so it's definitely not that small:

https://gist.github.com/stenver/d4e1e5cda0052b391cddfb40727a9af8

I also tried different approaches, like using rgeo shape reader and ask area on geometry from that(in case my factory is invalid) - the results are exactly the same

RGeo::Shapefile::Reader.open(@shpfile_location.to_s) do |file|
  file.each do |record|
    puts record.geometry.area # => 1.7460196668357376e-05
  end
end

Can anybody please give any hints as what could be wrong?