Process each item in a list separately?

Hello, I have a basic Max question. I want to process each item in a list of variable size separately, for example dividing each number by two. I know I can use [zl iter] to iterate through the list, but I can't figure out how to put the list back together. [pack] and [join] don't work because of multiple inlets. [zl stream] has an overlap, so it doesn't work. [thresh] almost works but it's too unreliable for my usage. Is there a simple way to do this?

Edit: I just remembered I can use [vexpr] to perform most math operations on a list. However, it seems it doesn't do it for each item, you have to specify the arguments.