I have a polygon that is formed using Quick OSM.

[![enter image description here][1]][1]

After that, I add an area calculation field to it, automatically using the QGIS tools.

[![enter image description here][2]][2]

How can I use PyQGIS to get the sum of the areas of the selected parts of the polygon multiplied by 5 and display the answer in the Python Console?

  [1]: https://i.sstatic.net/bmAj9.jpg
  [2]: https://i.sstatic.net/ebX0F.png