okay, i am trying to convert cost per gallon to $2.89 and have the total cost for the trip to equal $.012 instead of .121234545, will someone please help?

//Rextester.Program.Main is the entry point for your code. Don't change it. //Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5 using System; using System.Collections.Generic; using System.Linq; using System.Text.RegularExpressions; namespace Rextester { public class Program { public static void Main(string[] args) { decimal miles, gasoline; decimal milesPerGallon; decimal tot_miles = 0.00m; decimal gas_cost = 0.00m; Console.WriteLine(" Mileage Calculator "); { Console.Write(" Enter number of miles for a trip: "); miles = Convert.ToInt32(Console.ReadLine()); Console.Write(" Enter average cost of gasoline: "); gas_cost = Convert.ToInt32(Console.ReadLine()); Console.Write("Enter the MPG for vehicle: "); gasoline = Convert.ToInt32(Console.ReadLine()); milesPerGallon = (decimal)miles / (decimal)gasoline; tot_miles += milesPerGallon; calculateCost(gasoline, gas_cost, tot_miles); Console.WriteLine(); } } static void calculateCost(decimal milesPerGallon, decimal gas_cost, decimal tot_miles) { decimal cost = (( tot_miles / milesPerGallon ) * (decimal)gas_cost).ToSring("C")); Console.WriteLine(" Cost of the trip is: " + cost); } } }