conversations.from: human
conversations.value: Shara collects shells. She had 20 shells before she went on vacation. On vacation, she found 5 shells per day for 3 days. Then he found 6 shells on the fourth day. How many shells does she have now?
  Work out the solution step by step.
conversations.from: assistant
conversations.value: Shara collected 5 x 3 = 15 shells for 3 days.
  So she collected 15 + 6 = 21 shells rom her vacation.
  Thus, she now has a total of 20 + 21 = 41 shells.