This is something useful which I found in almost any 3D editing program
It could be useful when editing gizmo data, texture tiling, and basically anywhere an alphanumeric imput is required.
If I have a gizmo heading of -34.6, and I want to rotate that object by 180°, I could just input "+180" after the current rotation, and have the result automatically texted in the box, without the need of using external calculators or mind calculation.
Same for dividing, multiplying and subtracting. This would make the process of adding geometrically precise layouts easier for any circumstance (at least for scenery) and I'm sure that planes development has many areas where it could be of real help