I think you have misplaced a unit somewhere, because that would be a truly absurd amount of corn.

A quick trip past wikipedia [1] suggest the figure was 383.6 million tonnes in 2021, which is still approximately a thousand kilograms of corn per person, which is still a lot (more than my annual consumption, that's for sure)

[1]: https://en.wikipedia.org/wiki/Corn_production_in_the_United_...