Value defaults to an unsupported unit when entering a large enough number in a Style's Float Variable in UI Builder

Steps to reproduce:

1. Open any Project
2. Create a UIDocument Asset in the Project Browser and open it in UI Builder
3. In the StyleSheets panel create a new USS and select the :root selector
4. In the Inspector Variable list create a Float Variable
5. Change the Variable value to e.g. "7777777777777777777"
6. Save the document and USS

Actual results:

Value defaults to "7.777778e+18" value and error is logged:
"Assets/test2.uss (line 2, column 18): error: Unsupported unit: '7.777778E'
UnityEditor.AssetDatabase:Refresh ()"

Expected results: Value clamps to largest supported value, not something that can't be used

Reproducible with versions: 6000.3.14f1, 6000.4.4f1, 6000.5.0b5, 6000.6.0a3

Can’t test with versions: 6000.0.73f1 (No Variables in selector)

Tested on (OS): Windows 11