conversations.from: human
conversations.value: In preparation for the upcoming Olympics, Rita's swimming coach requires her to swim a total of 1,500 hours. Rita has already completed 50 hours of backstroke, 9 hours of breaststroke, and 121 hours of butterfly, but she is unhappy with her inconsistency. She has therefore decided to dedicate 220 hours every month practicing freestyle and sidestroke. How many months does Rita have to fulfill her coach’s requirements?
  Give me a detailed solution.
conversations.from: assistant
conversations.value: So far, time spent practicing backstroke, breaststroke, and butterfly is 50 + 9 + 121 = 180 hours
  Since Rita’s must swim 1500 hours, the freestyle and sidestroke practice sessions will take 1500 - 180 = 1320 hours
  Rita will practice for 220 hours/month, meaning she will meet her coach’s target in 1320/220 = 6 months.