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Comment by thundergolfer | Hacker News Reader

> who sent me a Lisp program computing ...

I don't really know Lisp, but how do you get a Lisp to run that expression? I tried it in Emacs Lisp, Racket, Common Lisp.

It runs just fine in Python, and returns: 29760

> # sum(years * (hours/week)) * (weeks/year)

Appears to be Python?

Here's it converted to Common Lisp:

    (defun sum (years hours-per-week weeks-per-year)
        (* (* years hours-per-week) weeks-per-year))

You must write your own lisp, and that’s the beauty of it.

Definitely not LISP. LISP uses a prefix notation, the expression in the post uses infix (like most programming languages).

This is the lisp-way:

(* 48 (+ (* 4 10) (* 2 30) (* 5 20) (* 6 20) (* 6 25) (* 15 10) ))