Counting from 0 to 4000, this list converts millimetres to inches displaying 3 decimal places for inches.
The modern definition of the inch is exactly 25.4 millimetres.
1 inch = 25.4 millimetres
1 millimetre = 1 ÷ 25.4 inches
The arithmetic calculation to convert from millimetres to inches can produce answers with a long list of decimal places. I have arbitrarily limited the number of decimal places displayed to 3.