Convert numbers between binary, octal, decimal, and hexadecimal
Input: 1010 (Binary)
Result: 10 (Decimal)
Input: 255 (Decimal)
Result: FF (Hexadecimal)
Input: 77 (Octal)
Result: 111111 (Binary)
Input: A5 (Hexadecimal)
Result: 165 (Decimal)