why the method is giving error eventhough i have bounded gererics type parameter {T extends Number}? Here T should accept Integer,Double,Float...etc?

Question

I'm new to Java & have learned Generics Today. Im facing this problem & I don't know what I did wrong here!! I really appreciate any help you can provide:)

//Practice Que:  
//AIM of this code:: to pass any "Number" type(byte, int, float...) and get its sum,sub,mul

class Operations<T extends Number> {
    T x1, x2;

    public Operations(T x1, T x2) {
        super();
        this.x1 = x1;
        this.x2 = x2;
    }

    public void Arithmetic() {
        // ----- **WHY ERROR???** => The operator +,-,* is undefined for the argument type(s) T, T ------------
        System.out.println("sum: " + (x1 + x2));
        System.out.println("sub: " + (x1 - x2));
        System.out.println("mul: " + x1 * x2);
        // ----------------------------------------------------------------------------------------
    }
}

public class Example1 {
    public static void main(String[] args) {
        // for Integer
        Operations<Integer> o1 = new Operations<>(2, 3);
        o1.Arithmetic();

        // for Float
        Operations<Float> o2 = new Operations<>(2.5f, 3.5f);
        o2.Arithmetic();
    }
}