Yes 10 times as many plants need to be grown but the harvest methods are quite different.
A cow provides fertilizer(manure) and the farming equipment(it eats the grass there) .
I suspect based on my recollections sun->plants is 1% and plants->animals is 10% and animal->animal is also 10%.
Also per kg meat is more dense so you are shipping less of it.
I am from Australia though.
20 million total cows vs half a million in feedlots.
Brazil is one of the countries with the most cows
One “missing picture” in the Brazilian cattle industry though, is that of a North American-style feedlot. Only 4% of the cattle killed each year are “fattened” in feedlots. With Europe being Brazil's main beef export market, the majority is grown to finish under a hormone-free regime on grass pastures.