Calculuator

 diff -u <(seq -f '%03.0f' 0 999) <((bc <<<'scale = 3009; 1 / 998001' | tr -d '\\\n'; echo) | sed s/.// | fold -3) 

 diff -u <(seq -f '%03.0f' 0 999) <((bc <<<'scale = 3009; 1 / 998001' | tr -d '\\\n'; echo) | sed s/.// | fold -3) 

http://stackoverflow.com/questions/2331936/bash-scripting-and-bc