import chess.*;//GEN-BEGIN:header
import java.awt.*;

/**
 * CalculatePi.java
 *
 * Created on Jun 19, 2007, 1:34:40 PM by student
 */
public class CalculatePi {
    public void run() {//GEN-END:header

        // Here you go!
 


    public static void main(String[] args) {
        /* here you go */
        
        /* pi= 4 * ( 1.0 - 1/3. + 1/5. - 1/7. + 1/9. + ... ) */
        
        double pi= 1.0;
        double denominator=3;
        
        while ( denominator<100000000000. ) {
            pi= pi - 1 / denominator;
            pi= pi + 1 / ( denominator + 2);
            denominator= denominator + 4;
        }
        
        Chess.report( "pi="+(4 * pi)+" "+Math.PI );
        
        /* two braces below */
    }
    
}
 
    } //run//GEN-BEGIN:footer
    
    public static void main( String[] args ) {
       new CalculatePi().run();
    } //main
} //class//GEN-END:footer