It does involve some calculations. Take it that they start at the same time and each starts eating a new pizza, both the same size, as the previous one.
I’m still trying to work it out ! Maths was never my strong suit.
I remember being surprised when a family of teenage boys visited and ate a whole pizza each. Being mostly girls in our family we share one and ate salad with it.
Marydoll it reminds me of “ problems “ in primary school . I could never do them and was told to sit at the back and write a story because I asked too many questions. Says it all really.