Make sims wall build system

In the construction script is a static mesh and a 3d vector widget
The wall faces the 3d widget correctly but the scaling is the problem
When you look from the top down to the wall
You see the wall correctly scaling in the positive (X) and (Y)
But between them EG (X 4) (Y 4) it gives a different scale
I dont know if (pi 3,14) is an option but of you could help me

The question is to old for answer