// Arup Guha
// 7/7/03
// Short Program to illustrate the calculation of a formula in java, using
// variables and arithmetic expressions.

public class Circle {
	
	final public static double PI = 3.14159265358979;

	public static void main(String[] args) {

		// Calculate area of circle.
		int radius = 30;
		double area = PI*radius*radius;

		// Print out area.
		System.out.print("The area of a circle with radius "+radius);
		System.out.println(" is "+area);
	}
}