Over a third of crops are grown to feed livestock, and that's if you're not counting pasture as a crop, which it absolutely is - arguably our first solar powered factory floor. Even areas that were grazed in the past have had the relative proportion of native flora and fauna severely reduced to minimal levels through introduced grasses and overgrazing. To get a feel for land use against calorie production, you could have a browse through https://www.nationalgeographic.com/foodfeatures/feeding-9-billion/ for an overview.