How to get a float result by dividing two integer values using T-SQL?

Using T-SQL and Microsoft SQL Server I would like to specify the number of decimal digits when I do a division between 2 integer numbers like:

select 1/3

That currently returns 0. I would like it to return 0,33.

Something like:

select round(1/3, -2)

But that doesn’t work. How can I achieve the desired result?