444 555 666 | English Extended Gematria and English Reduction Gematria overlap, DMV, NEW, FOX

D = 4

M = 13 = 4

V = 22 = 4

N = 14 = 5
E = 5
W = 23 = 5

F = 6
O = 15 = 6
X = 24 = 6

The English Extended cipher is the same as the base ciphers for Hebrew and Greek.  Both of those ciphers (Hebrew and Greek) have rules so that there are values 1 through 9, 10 through 90, and 90 through 900.  To make 900 in English extended, you would likely use & as 800 and Z as 900, just like you sing "AND Z" to end the alphabet song.  & = AND (and was once considered a letter)