What Are Plank Units?

We there is a certain minimum unit of time which makes sense. And be below that, the smaller unit units of time don't make sense. How do we even say that the universe had a beginning at equal zeal if you can never stop dividing time into smaller and smaller units? Well, it's like this. So there is something called plank units. These are the plank units, the plank length, the plank mass, the plank time and the plank temperature. We have a what are they made up of? The made up of the speed of light in vacuum, c, the gravitationa constant g, the reduced plank constant ch cross, h bar, which is h, plank constant