Calculation Problem

/* Your task is to help the global programmer community. You will receive a set on letter-numbers (strings) on one line separated with a single space ‘ ‘. Sum all of the letter-numbers and print out the resulting sum both in the 23-based system and decimal system. The digits go as following: a -> 0, b -> 1, c -> 2, d -> 3 ... j -> 9, k -> 10 ... v -> 21, w -> 22.
 * Print out the sum of the given numbers in the format “[sum in 23-base numeral system] = [sum in decimal system]”. */

namespace Calculation_Problem
{
    using System;
    using System.Linq;
    using System.Text;

    class CalculationProblem
    {
        static void Main(string[] args)
        {
            string[] words = Console.ReadLine().Split();
            int totalSum = words
                .Sum(word => word
                    .Select((t, i) => (int)((t - 97) * Math.Pow(23, word.Length - i - 1)))
                    .Sum());

            StringBuilder sb = new StringBuilder();
            int quotient = 0;
            int temp = totalSum;
            do
            {
                quotient = temp / 23;
                int remaider = temp % 23;
                sb.Append((char)(remaider + 97));
                temp = quotient;
            } while (quotient != 0);

            string sumIn23NumSystem = sb.ToString();
            char[] letters = sumIn23NumSystem.ToCharArray();
            Array.Reverse(letters);

            Console.WriteLine("{0} = {1}", new String(letters), totalSum);
        }
    }
}