After revaluation and the introduction of the new franc, many French people continued to use old francs ("anciens francs"), to describe large sums (throughout the 1980s and well in to the 1990s and virtually until the introduction of the euro, many people, old and young – even those who had never used the old franc – were still referring to the old franc, confusing people). For example, lottery prizes were most often advertised in amounts of centimes, equivalent to the old franc, to inflate the perceived value of the prizes at stake. Multiples of 10NF were occasionally referred to as "mille francs" (thousand francs) or "mille balles" ("balle" being a slang word for franc) in contexts where it was clear that the speaker did not mean 1,000 new francs.