Unable to find the Offset and Extents values

  A.TransformGroup transformGroup2 = new A.TransformGroup();
            A.Offset offset2 = new A.Offset() { X = 2002951L, Y = 646866L };
            A.Extents extents2 = new A.Extents() { Cx = 1052545L, Cy = 1055542L };

I want to design the pie shape in PPT by using open XML using .net. I used Open XML SDK Productivity tool to get the code.

In the above code how the 2002951L, 646566L, 1052545L, 1055542L calculated