I think you did the math wrong?
Area is pi x r^2, which for a 16" pizza would be pi x 8^2 = pi x 64, which is right about 200in^2
A few of the pizza places around here offer 20" pizzas, which would be pi x 10^2, or pi x 100 = 314in^2, which is actually big enough to feed a couple people.
That said, whenever I read "two-pizza team" (a term I've never heard before), I assume that means 4-5 people at most.
And a 2 pizza team is the number of people you can feed lunch to with 2 pizzas.
Most people would do 1-2 large slices for a lunch, so 4-8 maybe 10 people is a 2 pizza team.
About the same size range as a rifle squad.
