So given that, given what I've just told you, I encourage you to pause the video and see if you can figure out the volume of this thing that I've, I could shade it in a little bit. The volume of this thing that I've just started, this three-dimensional figure that we are attempting to visualize. So I'm assuming you've had a go at it. And one way to think about it is, well, let's just think about each of these. Let's split up the figure into a bunch of disks. Into a bunch of disks. If you figure out the volume of each of those disks, if you figure out the volume of each of those disks and sum them up, then that would be a pretty good approximation for the volume of the whole thing.