You divide 346 by 1,000 and get .346.
0.346
Divide it by 1000 and so 346/1000 = 0.345
1000.0
That would be 3/1000, which in decimal notation is 0.003.
258/1000= .258
MDCCC = 1800 in decimal notation M = 1000 D = 500 CCC = 300
97/1000
0.335
0.092
416/1000 = 0.416
11/1000 = 0.011