To clarify (from wikipedia):
Billion may refer to:
In numbers:
Long and short scales
1,000,000,000 (number), one thousand million, 10^9, in the commonly used short scale
1,000,000,000,000 (number), one million million, 10^12, in the long scale
In german we always use the long scale.
So, given the current numbers, we are closing in on overall 10^9 - or 1 billion in the english commonly used short scale - kilometers overall driven in LFS since introduction of lfsworld the way we have it. That's really a milestone!