Texture scaling

[Dreadlorde]

Is there any math problem I can use to find what a texture's dimensions should be when I use UI scale? My UI scale is .64 and this is what I did to get what should be the texture size at that scale:

for a 512 px wide

512*0.64=327.68
512-327.68=184.32
512+184.32=696.32

That should be the right dimension for the texture at .64 UI scale..right?

Thanks for any help with this.