#!/bin/bash

ANZAHL="1000"
GENAUIGKEIT="64"

LANG=C
F1=0
F2=1

for NR in $(seq 1 ${ANZAHL})
do
        F0="${F1}"
        F1="${F2}"
        F2="$(echo "${F0} + ${F1}" | bc -l)"
done
echo "scale=${GENAUIGKEIT}; ${F2}/${F1}" | bc -l