square = -> {|num| num*num }

cube = -> {|num| num*square(num)}

l = lambda do |a, b|
      tmp = a * 7
      tmp * b / 50
    end

hello = -> {puts "Hello World"}

hello_world = -> {|| puts "Hello World!"}

fill = -> {|container, liquid = "coffee"| "Filling the #{container} with #{liquid}" }
    
puts cube square 5