How do I Adjust Touch coordinates while scaling layer?

Here is a gif, explaining what I mean.

How do I adjust touch coordinates, to create these 4 colored blocks on correct positions considering the layer scale?

Also, should I worry about long numbers like this one?

How can I make it shorter? round() will round this number to 1 (because scaling takes value between 0, 1 and 2).

UPDATE: I just realized you said layer scaling, not layout scaling, which my original info referred to. Refer to the manual entry for touch. X and Y don't adjust for layer scaling/rotation/what have you unless you give it a layer as a parameter. For example:

Touch.X(0)
Touch.Y(0)[/code:msahtfiz]
Gives you adjusted touch coordinates for layer 0.

As for the number length, you absolutely should not worry about that.  There's no extra work processing a high precision number like that vs. a rounded number, so long as internally they're stored as the same type(which they almost certainly are).

UPDATE: I just realized you said layer scaling, not layout scaling, which my original info referred to. Refer to the manual entry for touch. X and Y don't adjust for layer scaling/rotation/what have you unless you give it a layer as a parameter. For example:

Touch.X(0)
Touch.Y(0)[/code:2crfrhp9]
Gives you adjusted touch coordinates for layer 0.

As for the number length, you absolutely should not worry about that.  There's no extra work processing a high precision number like that vs. a rounded number, so long as internally they're stored as the same type(which they almost certainly are).

Thanks alot!