If you want to write as a decimal number, you can simply use the written method for division:
There is a problem: You could divide again and again without reaching a final result, the division remainder will always be 1. Therefore, your decimals will be 3.
Recurring decimal numbers
Decimal numbers like are called recurring decimal numbers, because the same numbers keep recurring infinitely often. There is another way of notating You can just write . Another recurring decimal number is In this case, two numbers keep recurring.