conversations.from: human
conversations.value: Find the answer to this math problem: Martin eats 1/2 cup of berries every day.  The grocery store is selling a package of berries (1 cup per pack) for $2.00.  How much will he spend on berries in a 30 day period?
conversations.from: assistant
conversations.value: Martin eats 1/2 cup berries every day so over 30 days that's .5*30 = 15 cups of berries
  The grocery store sells 1 cup packages of berries for $2.00 a pack.
  Martin needs 15 cups so that's 2*15 = $30.00.