conversations.from: human
conversations.value: Find the answer to this math problem: Dolly wants to ride the Ferris wheel twice, the roller coaster three times, and the log ride seven times. The Ferris wheel costs 2 tickets, the roller coaster costs 5 tickets and the log ride costs 1 ticket. Dolly has 20 tickets. How many more tickets should Dolly buy?
conversations.from: assistant
conversations.value: It costs 2 rides x 2 tickets/ride = 4 tickets to ride the Ferris wheel twice.
  It costs 3 rides x 5 tickets/ride = 15 tickets to ride the roller coaster three times.
  It costs 7 rides x 1 ticket/ride = 7 tickets to ride the roller coaster seven times.
  In total Dolly needs 4 tickets + 15 tickets + 7 tickets = 26 tickets.
  Dolly needs to buy 26 tickets - 20 tickets = 6 more tickets.