$ scheme48 Welcome to Scheme 48 1.8 (made by klim on Tue Feb 17 11:32:15 CST 2009) Copyright (c) 1993-2008 by Richard Kelsey and Jonathan Rees. Please report bugs to scheme-48-bugs@s48.org. Get more information at http://www.s48.org/. Type ,? (comma question-mark) for help. > ,load exer5.scm > (fast 2 * 10 1) 1024 > (fast 5 + 10 0) 50 > ,exit $