conversations.from: human
conversations.value: I would love to understand how to solve this problem: Rebecca drinks half a bottle of soda a day. She bought three 6-packs of sodas the last time she was at the store. How many bottles of soda will she have left after four weeks?
  Can you explain?
conversations.from: assistant
conversations.value: Rebecca bought 3 * 6 = 18 bottles of soda.
  A week is 7 days, so she will drink 4 * 7 = 28 half bottles of soda in four weeks.
  A bottle is two half bottles, so she will drink 28 / 2 = 14 bottles of soda in four weeks.
  Thus, after 4 weeks, she will have 18 - 14 = 4 bottles of soda left.