Why, when inheriting a class, I cannot see the variable, although it is with the protected modifier?

Question

Java

class Math{
       protected static final double PI = 3.14;       
}

class SubMath extends Math{
    Math.PI; // выдает ошибку
}

If everything is very obvious here, then please do not scold me, I'm still learning =)
Thank you in advance for your ANSWER!

Answer 1

Because only declarations can be in the body of a class, and instructions should only be in the body of methods.

Answer 2

нельзя испоьзовать 3.14 как переменную
class SubMath extends Math{
    3.14 // выдает ошибку
}

class Math{
       protected static final double PI = 3.14;       
}

class SubMath extends Math {
    public static double pi() {
        return Math.PI; // 3.14
    }
}