conversations.from: human
conversations.value: This math problem has got me stumped: Jerry takes 2 antacids that weigh 2 grams each and are 5% zinc by weight. Then he takes three more smaller antacids that weigh 1 gram each and have 15% zinc. How many milligrams of zinc does he eat?
  Can you show me the way?
conversations.from: assistant
conversations.value: First find the total weight of the big antacids: 2 grams/antacid * 2 antacids = 4 grams
  Then convert that weight to milligrams: 4 grams * 1000 mg/gram = 4000 mg
  Then multiply that number by 5% to find how much zinc is in the big antacids: 4000 mg * 5% = 200 mg
  Then find the total weight of the smaller antacids in milligrams: 3 antacids * 1 gram/antacid * 1000 mg/gram = 3000 mg
  Then multiply that number by the percent of zinc to find the amount of zinc in the small antacids: 3000 mg * 15% = 450 mg
  Then add the zinc Jerry gets from each set of pills to find the total amount of zinc he eats: 450 mg + 200 mg = 650 mg