Octal to Decimal Converter

Octal shows up in a few specific corners most people don't encounter often enough to have the conversion memorized, an old-style Unix permission notation, an escape sequence in a language like C or Python where a backslash followed by digits represents a character by its octal code, both cases where getting the actual decimal or character value means converting octal correctly rather than guessing. This tool converts octal numbers into decimal, binary, and hexadecimal all at once, covering the specific, less common base that shows up in those particular corners of programming and systems work. Useful for decoding an octal escape sequence found in a string literal back into the actual character it represents, converting an octal value from older documentation into a more familiar decimal number, or checking an octal number's binary and hexadecimal equivalents in one pass.