Area Of Equilateral Triangle

import java.util.Scanner;
class Raj{

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

  s = sc.nextInt();

   a = (float)(Math.sqrt(3) * (s * s))/4;

    System.out.println("\n Area of Equilateral triangle: "+a);

    }
  }

  
Output : 

   
 
      
  Enter the length of side:
  6
  Area of the Equilateral triangle: 15.588457