piano-tuners-commented.f (358B)
1 5M 12M # number of people living in Chicago 2 0.002 0.01 # fraction of people that have a piano 3 30 180 # minutes it takes to tune a piano, including travel time 4 / 48 52 # weeks a year that piano tuners work for 5 / 5 6 # days a week in which piano tuners work 6 / 6 8 # hours a day in which piano tuners work 7 / 60 # minutes to an hour 8 # ^ piano tuners in Chicago 9