I wonder if you could help me with the text below. I get the gist of the message, but am struggling with decena.
Nam decēna mīlia Americānōrum cōnāta sunt ad centiēs centēna mīlia dollāriōrum raedāriīs mittere Canadēnsibus.
For ten thousand Americans tried to send 10 million dollars to the truck drivers.
Am I right in thinking that Latin doesn't have numbers for "million, billion" so uses an adverb e.g. 10 million = one hundred times (centies - adv) one hundred (centena - adj) thousand.
Where I struggle is the decena. Is this an adverb (surely it should be deciens?) or an adjective (surely it should be decima) or something else?
I have taken this from Nuntii Latini so this is very much nova latina, but I presume entirely correct.
Thanks for any help!