Why is it impossible to get byte and short in Kotlin when adding variables with the same types?

Question

Kotlin

Why, when adding 2 variables of type Byte and Shor, we get a variable of type Int
If it explicitly indicates what type the variable should be, then it gives an error

Answer 1

there is simply no + operation on bytes, since bytes are first converted to integers, and the result of adding two integers is a (32-bit) integer, i.e. int