Step 4: Inside the method, we multiply both the value stored in the different variable names where one of the variables is the variable of an abstract class. Then we call the method of the abstract class by its object. Step 3: Now in the main class of our function that is ‘GeeksforGeeks’ here, where we will create an object of abstract class ‘Content’ by reference to its derived class object. Inside GFG class we are going to define a constructor and inside the method call the parent class constructor by using the super keyword and define the abstract method of its parent class in it. Step 2: We create a class that must be derived from this abstract class ‘Content’ named ‘GFG’. Step 1: We create an abstract class named ‘Content’ and define a user define a constructor with one argument, variable with name ‘a’, and an abstract method named as ‘multiply’ Implementation: Here in this program, we are going to multiply two numbers by using the following above approach as mentioned.
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