Which 2 continents do most farmers live in?

I don't know the figures but I'd be very surprised if it wasn't Asia and Africa. Both have high populations and populations that live directly off what they grow.

There are more people in Africa than in the US, Canada, the UK, Australia, Russia, Japan, Mexico, and Brazil all put together. And Africa is small compared to Asia. Asia alone has more people than the entire rest of the world (including Africa and all the other countries listed above).