field[abValue].value = round(field[abValue].value, number of decimals, round behavior)
rounds the value of the field to some number of digits (defined by the second aspect in the parenthesis, 0 meaning to whole numbers). Round behavior of 0 means "round up if .5 or greater", 1 means "always round up", and -1 means "always round down". The first aspect can include some manipulation of its own.