Ruby/Number/Bignum class

a = 5
puts a.type
a = 5.888
puts a.type
a = 9999999999
puts a.type

rice_on_square = 1
64.times do |square|
  puts "On square #{square + 1} are #{rice_on_square} grain(s)"
  rice_on_square *= 2
end

puts 1073741823.class
puts 1073741824.class