Aovx

After reading the original text and doing some math it's 548 grams of rice (608kcal) per person per day. That was the short version continue reading if you want the full explanation. 一两银子,等于十钱,一千文。This basically means 1 Silver is equal to 10 Bronze or 1 thousand Wén. Wén is an old classifier for coins. Mtl probably didn't know that. 1 Wén is 1 catty of rice. 1 catty is about 600 grams, so 1000×600=600000 grams of rice. 600000 grams split three ways is 200000 grams per person. 200000 divided by 365 is 547.94 grams per day. Brown rice is 111 Calories per 100 grams, so basically 608 calories per day per person.