1.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("a= ");
            double a = double.Parse(Console.ReadLine());
            Console.Write("b= ");
            double b = double.Parse(Console.ReadLine());
            double res = a / b;
            Console.WriteLine("{0:.000}/{1:.000}={2:.000}", a, b, res);
        }
    }
}