ruby wont dvide age : Hello all I am trying to divide the user inputted age by 2, I am fairly new to ruby but I am pretty sure to divide I would do b/a but for some reason it is not working below 

    
        #!usr/bin/ruby
        
        puts "what is your name?"
        name = gets.chomp
        
        puts "when were you born please enter your birthdate"
        birthdate = gets.chomp
        
        puts "how old are you "
        age = gets.chomp
        
        
        
        
        puts "hello"  + name + " wow that is a good day to be born" + "thats a great age"
        puts "
    
    the half  of your age is" + age/2 + " that is good to know"

