Now you're getting somewhere... Don't feel bad about confusing metric symbols. Even NASA gets symbols wrong sometimes. They once crashed into Mars because of confusion not between metric units, but between the two systems .
The great thing about metrics is once you know what you're dealing with, it's easy to convert between the units.
:-)
Still, the model you're using only predicts dust particles. It isn't going to help much in predicting how many large rocks are trailing a fragmented comet nucleus. Best to use observation/radio returns for that.
Wow, you’re both wrong. Yes, “m” means meters. What do I know though, I’m only a professional scientist...