puts "13: a baker's dozen".to_i # => 13
puts '1001 Nights'.to_i # => 1001
puts 'Night'.to_i
puts 'Equipment'.to_f
puts '$60.50'.to_f # => 0.0
puts 'AAAA!'.hex
puts '0xA2Z'.hex # => 162
puts '-10'.oct # => -8
puts '-109'.oct # => -8
puts '3.14'.to_i # => 3