what does this have to do with slavic lives matter and why is it a meme on this scream?

why does this scream have Slavic line matter?

what is wrong with June, is your country still have school in the summer?

6-year-old me says 100000000000000000000000000/10 and me now says

100000000000000000000000000000000000000000000000000/10

yes, I find this in school then and used it before it got banned :(