how to calculate fractions with let?

samuels_at_red.seas.upenn.edu
Date: 03/21/05 

Date: Mon, 21 Mar 2005 17:37:30 +0000 (UTC)

hi,
for the arithmetic expression 7/3, what unix function/command will show me the correct value of 2.33 and not just 2 like let?
thanks in advance,
-maurice
samuels@seas.upenn.edu