Poll: Asking for a friend – what do you understand by "6x4"

Recently I've had an enlightening discussion with a colleague about notation in maths and computing. I don't want to "lead the witness" so I'm not going to repeat it here, but I'd like to ask about the internal understanding of individuals in this community.

What do you understand by the expression "6 x 4" ? I fully expect that I haven't covered all the possibilities, I know that self-selected polls are useless for proper statistics, I know that some people just click all the options, etc. All that not withstanding, I'd be interested to see what people think.

Thanks.