> In its first 530 days of scientific observations, DAMPE detected 1.5 million cosmic ray electrons and positrons

> "we now expect it to last 5 years"

> That will allow the satellite to record more than 10 billion cosmic ray events.

Assuming DAMPE continues detecting cosmic ray events at its current rate, I think the total number after 5 years would be a bit over 5 million. That's a few magnitudes off of 10 billion... Math fail, or do I misunderstand something?

1.5m / 530d * 5y * 365d/y = 5.165m