Everyone started to laugh again when Rex suddenly stood up and said, "Yes, thank you for the explanation but can you tell me by what means is 1 million platinum coins less than 100 million gold coins?"
"Huh...?"
The silence returned again and everyone stopped laughing immeditely the moment they heard this.
Even Emilia herself was shocked and asked, "1 million... platinum coins?"
NOTE:
100 copper coins = 1 bronze coin.
100 bronze coins = 1 silver coin.
1000 silver coins = 1 gold coin.
1000 gold coins = 1 platinum coin.
So when Rex told that he was bidding 1 million platinum coins, it's worth was equivalent to 1 billion gold coins which was 10 times of 100 million gold coins.
Everyone was just staring at Rex after being shocked in such a way because the king himself would not have so many platinum coins.
They wondered about the source from where he got them but were unable to think anything.