input: Write a python function to convert a given number into binary, octal, and hexadecimal representations.
  assert decimal_binary_octal_hexadecimal(10) == ("0b1010", "0o12", "0xa")
  assert decimal_binary_octal_hexadecimal(255) == ("0b11111111", "0o377", "0xff")
  assert decimal_binary_octal_hexadecimal(100) == ("0b1100100", "0o144", "0x64")
output: def decimal_binary_octal_hexadecimal(number):
      binary = bin(number)
      octal = oct(number)
      hexadecimal = hex(number)
      return (binary, octal, hexadecimal)