Golfing Relay Race

Question

You need to write a program in any language that will produce (source code for) a program in a different language. That program will produce a 3rd program in another language and so on.

You should aim to create many programs; you aren't limited to 3. You can re-use a language, but it won't be counted in the scoring.

Your entry is the source code of the first program, together with a list of the languages of subsequent programs produced in the order they are produced. For easy reading maybe include each program's output/source.

Scoring will be the length of the source code of the first program divided by the number of different languages used.

---

To prevent solutions such as 1 (that has been pointed out in the comments) I suggest the following extra rule:

The output of one program must not be valid code in the language of that program.

Answer 1

My first time for that kind of challenge:

R > Julia > BrainF**k - 91 characters - Score: 30.33

The initial R code:

cat("'+'^8","\"[>\"","'+'^9","'>'","'+'^13","'>'","'+'^4","'<'^3","\"-]>.>+.>+.\"",sep="*")

It produces the following Julia code:

'+'^8*"[>"*'+'^9*'>'*'+'^13*'>'*'+'^4*'<'^3*"-]>.>+.>+."

Which produces:

++++++++[>+++++++++>++++++++++++++>++++<<<-]>.>+.>+.

which equates to:

Hi!

in BrainF**k.

NB: None of the three programs is valid in any of the two other languages.

Answer 2

Clojure → C → Python 2.7 → BASIC → Bash

Score: 13.40

(println"int main(){puts(\"print'PRINT\\\"echo\\\"'\");return 0;}")

Here is the breakdown:

1. Clojure

   (println"int main(){puts(\"print'PRINT\\\"echo\\\"'\");return 0;}")
   

2. C

   int main(){puts("print'PRINT\"echo\"'");return 0;}
   

3. Python 2.7

   print'PRINT"echo"'
   

4. BASIC

   PRINT"echo"
   

5. Bash

   echo
   

---

I guess a simpler alternative would be

print'echo'

in Python 2.7, which outputs Bash code. This has a score of 5.5, but isn't as fancy as what's above.