Here is a way:
Add 0.50 to the number, then use INTEGER. This will round up or down to the nearest integer.
If you want to round to the nearest even integer, for example, divide first then multiply. For example, you want to get the nearest even number from 17.3, divide by 2 (you get 8.65) add 0.50 (you get 9.15) do INTEGER (you get 9.00) then multiply by 2 (you get 18.0, the desired result).
In general to round to the nearest multiple of N of a number X do this:
N * INTEGER ( (X / N) + 0.50)
Using X = 17.3 and N = 10, you get 10 * INTEGER ( (17.3 / 10) + 0.50) = 10 * INTEGER ( 1.73 + 0.50 )
= 10 * INTEGER ( 2.23 ) = 10 * 2 = 20
The desired result.