The energy czar 25 year plan worksheet says meat yield is 1 GJ/hectare/year, using this value gives bad results for required land compared to available land and costs soar into the trillions for a bit of land. I went looking online for verification of this value and I found a few sites giving meat yield as 500,000-1,000,000 Calories/acre/year. 0.5-1 mil Cal/acre/year = 5.25-10.5 GJ/ha/yr. Try changing the meat yield to somewhere in that value and see what you get. Those sites I found were hippie-type vegan sites who don't give their references, if anyone can find verifiable references (such as from USDA) that supports any of the meat energy yield values, post it on the comments.

I'm pretty sure that the Arable land (red box at the top of agriculture tab) is wrong in the example.
The arable land for Brazil was 597,000 km^2 = 6.97% of 8.5Mkm^2.

In the box it said 5,970km^2 - so it is dividing by 100 for some reason.

^Dan, I looked...it's dividing by 100 because the input for that percent is in % form...i.e. "6.97" instead of "0.0697." I checked mine and the math works right...perhaps you should go back through and make sure you have put the percent arable on "initial data entry" in the form of a percent rather than a decimal.