Reverse a number - Decimal to Octal

Question

Write a program in C# Sharp to convert a decimal number into octal without using an array.

 

I have done the proram til here:

 

int decimalnumber = int.Parse(Console.ReadLine());

int remainder;

for (int i = 0; i < 3; i++)

{

remainder = decimalnumber % 8;

int quotient = decimalnumber / 8;

decimalnumber = quotient;

Console.Write(remainder);

}

 

when i execute the program and give input as  117 for example, i am getting ouput as 561. However, i should be getting 165. Pls let me know how i can reverse them with out using array.