first divide up your friends into infinitely smaller and smaller friends until you almost have zero friends

So you figure out the volume of pineapples by creating an equation for their shape, then divide it up.

You do that kind of arithmetic quite often if you work in a kitchen.

My knife only has room for 3 cuts, after that it's just flat bar. How do I cut these pineapples?

Me at uni: Let N = 2^2^...^2, n times, and G be a graph of size N, then using Szemeredis Regularity lemma...
Me at home: We have like 8-9 apples left honey, do you really need a precise number?

Just keep on halving it (trust me)