It's a bit more complicated than just adding up all the money and dividing it by the number of people.
Rich people don't spend their money, they use it to outbid each other for control of existing assets that the rest of us need and have no choice but to pay them for. Instead of spending that money on things that other people get paid to make (the "trickle down" lie), they use it to extort us for access to things we need to survive.
There is plenty enough in this world to go around. That so many have so little is nothing to do with the amount of arbitrary exchange tokens that exist.
You know that money isn't dug out of the ground, right? There's no gold standard any more. The number of exchange tokens is irrelevant when you're being extorted (most obviously on housing costs).
If there is enough to go around, then your money-based maths must be incorrect. You're contradicting yourself. Which is it?