Algebra I Quiz Question with grammar problem

Hello Khan Academy folks!

First, thank you for making Khan Academy. What an incredible resource! I'm an adult revisiting long-unused math skills, and I really appreciate this program.

I noticed a small content problem, and wasn't sure where else to report it. If this is the incorrect place, would you please let me know?

Algebra I Unit 6 : There is a question on linear equation systems regarding the pay of ancient Roman archers and legionnaires. It is true that a 'denarius' was a coin, but multiples of that coin were 'denarii', not denarius. Therefore, it costs 10 denarii to pay for archers, not '10 denarius'.

https://www.merriam-webster.com/dictionary/denarius

It's a small thing, but so as not to teach students to misuse the term, it would be best to correct this error.

Thank you!