When I run Android project all components land on top of each other

I’m very new to Android Studio and I’m trying to make my 1st app, where you enter 2 numbers and it adds them together. I’m having an issue with all the view components, because in studio, they look fine, but when I run it on my phone, all the components land on top of each other, as you can see in the image. As I said, I’m very new to Android, so I’m probably making a stupid mistake.Thanks for helping!
In studio
The view on my phone

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Author: Yankue Team