conversations.from: human
conversations.value: Alexis can sew a skirt in 2 hours and a coat in 7 hours. How long does it take for Alexis to sew 6 skirts and 4 coats?
conversations.from: assistant
conversations.value: It takes Alexis 2 x 6 = 12 hours to sew 6 skirts
  It takes Alexis another 7 x 4 = 28 hours to sew 4 coats.
  In total it takes Alexis 12 + 28 = 40 hours to sew 6 skirts and 4 coats.