7 galleons
Galleons are coins of the Wizard world so their exchange rate is unknown to us Muggles.
210 galleons
A synonym for "galleons" is boats. There is no antonym for "galleons." Please see the related link below.
Nine galleons.
Sky Galleons of Mars happened in 1988.
They use Galleons, a gold coin. There are also silver Sickles and bronze Knuts.
Clash of the Sky Galleons has 384 pages.
The ISBN of Clash of the Sky Galleons is 978-0385607216.
Clash of the Sky Galleons was created on 2006-09-07.
Arthur Weasley won 700 Galleons in the Daily Prophet Grand Prize Galleon Draw.
The prize money of the Triwizard Tournament was 1000 Galleons. According to Harry Potter Lexicon, 1000 Galleons is equal to approx. $10,000 or £5000.