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.
Sky Galleons of Mars happened in 1988.
Nine galleons.
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.
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.
Arthur Weasley won 700 Galleons in the Daily Prophet Grand Prize Galleon Draw.