The pizza is so big, the workload is so complicated, that pizza cannot fit a single oven. Again, no way it's going to fit a single oven. So you need to break the pizza into small pieces and each piece is going to go into a different oven. 

And then you need the ovens to be so synchronized that they will finish at the same time. So every slice of that pizza will be the same heat, the same readiness. 

And there couldn't be a slice that is earlier and slices that is later because then one bite is going to be cold and the other one is going to be hot, okay?