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import java.util.Scanner;

public class Main {
    
    // Define a static method named "areaCircle" that takes a double parameter named "radius" and returns a double value representing the area of a circle with that radius.
    
    
    
    
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        
        // Prompt the user to enter the radius of the circle
        
        
        // Store the user's input in a double variable named "radius"
        
        
        // Call the "areaCircle" method with the radius as an argument, and store the result in a double variable named "area"
        
        
        // Print out the calculated area
        
        
    }
}