conversations.from: human
conversations.value: I need help with this problem:
  Kamil wants to renovate his kitchen at home. For this purpose, he hired two professionals who work for him 6 hours a day for 7 days. What does it cost Kamil to hire these professionals if one of them is paid $15 per hour of work?
conversations.from: assistant
conversations.value: Two professionals work together 6 * 2 = 12 hours per day.
  They work for 7 days, so in total it means 7 * 12 = 84 hours.
  The cost of hiring these persons is 84 * 15 = $1260.