Area of Hexagon

import java.util.Scanner;
class Hexagon{

 public static void main(String[] args) {
 
  int side;
  float area;
  Scanner sc = new Scanner(System.in);
  System.out.println("\nEnter the length of side :");
  side = sc.nextInt();

  area = (float)(3 * Math.sqrt(3) * side* side)/2;

  System.out.println("\nArea of regular hexagon :"+area);

    }
  }