French has dedicated words for numbers 1 to 16. The numbers 17, 18, 19 are just “ten seven” “ten eight” ten nine". After that there is a pretty sensible pattern until 79 (“twenty”, “twenty and one”, “twenty two”, etc.). 80 is “four twenty”, and the pattern above 80 until 100 is saying “four twenty” followed by what number has to be added to 80 to get the desired result. For example 85 is “four twenty five”, 90 is “four twenty ten”, 94 is “four twenty fourteen”, and so on.
Above one hundred you just start counting from zero but prepend the number of hundreds/thousands/millions to the word, like in English. 104 is “hundred four” (not one hundred four), 398 is “three hundred four twenty ten eight”, 7425 is “seven thousand four hundred twenty five”
French has dedicated words for numbers 1 to 16. The numbers 17, 18, 19 are just “ten seven” “ten eight” ten nine". After that there is a pretty sensible pattern until 79 (“twenty”, “twenty and one”, “twenty two”, etc.). 80 is “four twenty”, and the pattern above 80 until 100 is saying “four twenty” followed by what number has to be added to 80 to get the desired result. For example 85 is “four twenty five”, 90 is “four twenty ten”, 94 is “four twenty fourteen”, and so on. Above one hundred you just start counting from zero but prepend the number of hundreds/thousands/millions to the word, like in English. 104 is “hundred four” (not one hundred four), 398 is “three hundred four twenty ten eight”, 7425 is “seven thousand four hundred twenty five”