import java.util.Scanner;

public class Fraction {
	private int x;//分子
	private int y;//分母
	private static double dx,dy;	

	public Fraction(int x,int y)
	{
		this.x=x;
		this.y=y;
	}
	
	public static double toDouble(Fraction a)
	{
		dx=a.x;
		dy=a.y;
		System.out.println(dx/dy);
		return dx/dy;
	}
		
	public int gcd(int x, int y) 
	{
		while(true)
		{
			if((y=y%x)==0)
			{
				return x;
			}
			
			if((x=x%y)==0)
			{
				return y;
			}
		}
	}
	
	public  void print()
	{
		if(x%y==0)
		{
			System.out.println(x/y);	
		}
		else
		{
			System.out.println((x/gcd(x,y))+"/"+(y/gcd(x,y)));
		}
			
	}
		
	public  Fraction plus(Fraction a)
	{
		Fraction w= new Fraction((this.x)*(a.y)+(a.x)*(this.y),((this.y)*(a.y)));
		return w;
	}
		
	public Fraction multiply(Fraction a)
	{
		Fraction w = new Fraction(this.x*a.x,this.y*a.y);	
		return w;
	}

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		Fraction a = new Fraction(input.nextInt(), input.nextInt());
		Fraction b = new Fraction(input.nextInt(),input.nextInt());
		a.print();
		b.print();
		toDouble(b);
		a.plus(b).print();
		a.multiply(b).plus(new Fraction(5,6)).print();
		a.print();
		b.print();
		input.close();
	}
}