#!/bin/bash
# Alvare - Celeron D # 
#     2.66 ~ 3.52    #
#       GPLv2	     #
#     GNU/Linux      #
#   Debian/Lenny     #
num=$#
default=2
if [ "$num" -lt "2" ];then 
	echo "ERROR: Insert at least two resistors"
 	echo "Usage:"
 	echo "`basename $0` [res1] [res2] [res3] ..."
else
 	temp1=$1
 	for (( $default ; $default <= $num ; default++  )); do
		value=`echo $* | cut -d' ' -f$default`
		value2=`echo "scale=10; ${temp1}*${value}/(${temp1}+${value})" | bc`
 		echo $value2
 		temp1=$value2
 	done
fi
exit 0