Hours in a Year homework

hours-in-a-year.rb

#Note: the 'age_in_seconds' method works fine as a method in irb but does not consistently work in this code?

print "What would you like to know?\nA: How many days, hours, and minutes are in a number of years\nB: How many minutes are in a decade\nC: How many seconds old you are\nD: Convert your age in seconds to years\n"
choice = gets.chomp.upcase

def time_in_years
  print "Years:"
  years = gets.chomp.to_i
  days = 365 * years
  hours = 24 * days
  minutes = 60 * hours
  seconds = 60 * minutes
  puts "There are #{days} days in #{years} year(s).\nThere are #{hours} hours in #{years} year(s).\nThere are #{minutes} minutes in #{years} year(s).\nThere are #{seconds} seconds in #{years} year(s)."
end

def minutes_in_decade
  min = 10 * (365*8) +(366*2) * 24 * 60
  puts "There are #{min} minutes in a decade!"
end

def age_in_seconds
  print "How old are you?"
  years = gets.chomp.to_f
  in_seconds = years * 365 * 24 * 60 * 60
  print "On your last birthday, you were #{in_seconds} seconds old."
end

def seconds_to_years
  print "How many seconds old are you?"
  age_seconds = gets.chomp.to_f
  seconds_per_year = 60*60*24*365
  age_years = (age_seconds/seconds_per_year).to_i
  puts "You are " + age_years.to_s + " years old."
end

case choice
when "A"
  time_in_years
when "B"
  minutes_in_decade
when "C"
  age_in_seconds
when "D"
  seconds_to_years
else
  puts "You didn't pick A, B, C, or D."
end

Good use of a case and methods. Also what about Ada's age?