L'offerta di oggi in pasticceria: compri 12 pasticcini e ne ricevi uno gratis, cioè 13 pasticcini

Today's offer at the pastry shop: you buy twelve pastries and you get a baker's dozen, which means you get an extra one for free

Per S. Valentino il nostro fiorista ha una speciale “dozzina” in offerta: non 12, come dovrebbe essere, e nemmeno 13, ma 14 rose rosse al prezzo di 12

For S. Valentine's day our flower-shop has a special “dozen” for sale: not 12, like it should be; not 13, like a baker's dozen, but 14 red roses for the price of 12