Here using this free online tool You can use convert Binary to Octal.

So what is Binary Number System:

In digital electronics, a binary number can be expressed a number that is a binary numeral system or has a base-2 numeral system which consists of just 0 and 1. Due to its straightforward implementation in digital electronic circuits using logic gates, the binary system is used internally by almost all modern computers and computer-based devices.

Octal Number System:

The octal numeral system, or Oct, in short, refers to a base-8 number system and uses digits from 0 to 7. where Octal numerals can be made from binary numerals by grouping many consecutive binary digits into groups of three.