one.thousand.and.twenty.four.rb

NUMBERS = {
    one:      1,
    four:     4,
    twenty:   20,
}

TIMES = {
    thousand: 1000,
    and: 1,
}

NUMBERS.each do |k, v|
    Integer.instance_exec { define_method(k) { self + v } }
    define_singleton_method k do v end
end

TIMES.each do |k, v|
    Integer.instance_exec { define_method(k) { self * v } }
end

puts one.thousand.and.twenty.four