How scale and position of a slider being a child object works?

When I drag and drop a Slider prefab to Hierarchy from Prefabs folder. It have normal scale and position but when I drag and drop into an object as child, the scale and position of slider is same in inspector window but in scene view it's not, it's so bigger. How can fix this? I know I can fix by changing scale and position of child slider but I can't do this for every project. I want to know easy way