Offset layers when resizing a composition

Hi all. Can someone explain to me the logic of shifting layers when changing the size of the composition?

It always seemed to me that it was done like this, but I don’t get the same result as when changing the size of the composition through the interface

var comp = app.project.activeItem;
var w = comp.width;
var h = comp.height;

var nW = 1920;
var nH = 1080;

var x = nW / w;
var y = nH / h;

writeLn(x)
writeLn(y)

var layer = comp.layer(1);
var position = layer.position;
var anchor = layer.anchorPoint

position.setValue([position.value[0] * x, position.value[1] * y]);

comp.width = nW;
comp.height = nH;