In the picture attached, I have modeled a lake to have a total area of 50.35cm^2.

My intervals were 2.375cm, and the top area came out to 26.125cm^2, and the bottom to 24.225cm^2.

The scale used is 2.375cm = 10m

If I now have my total area in cm^2, how can I now convert this back to meters squared using this scale?