Does the subject want to ask "how many pieces of Ejiao cakes can be copied from a catty of Ejiao"? 3 to 4 Jin. According to Wikipedia, 1 kg donkey-hide gelatin can cook 3 kg to 4 kg donkey-hide gelatin cake, because besides donkey-hide gelatin, some other ingredients, such as yellow wine, rock sugar, black sesame, walnuts, red dates, medlar, etc., need to be added to the donkey-hide gelatin cake, so one kg donkey-hide gelatin can cook 3 kg to 4 kg donkey-hide gelatin cake, which can mainly play a role in nourishing qi and blood after eating, and can be effectively improved.