Look at these numbers:
Notice that in French, commas are used where decimal points are in English!
If the value is a price in euros, you may write the Euro sign (€) in place of the decimal point:
Note that both spellings are pronounced the same, with the currency said in place of the comma.
ATTENTION: this does not apply to other currencies, with which the currency sign is written after the price:
(To pronounce prices, the currency is placed where the comma is.)
Spaces are used to separate thousands instead of commas (sometimes but rarely you may see periods/full stops used) :
When it comes to decimal numbers, you pronounce the comma (virgule), except in case of currency, when you insert the currency (here, euros) in-between the integer and the decimal.