The english translation is not natural here, a better translation would be: "One thousand times one thousand is one million"

Again, it nerves that the correct solution is marked as wrong: "1000 times 1000 is 1000000", but it would be okay to write "1000 times 1000 is 1 million". Sorry, that is not right.

Összetett számok 2000 fölött különírandóak. Egy millió. Nem?

I can't use egy millió?

it has been corrected, thanks gr8fuld34d