I assume you're trying to write 25.4mm/inch in scientific notation.
To write something in scientific notation, move the decimal place forward or backward until only one number is not a decimal. Then, multiply it by 10x, where x is the number of times you moved the decimal place back. If you moved the decimal place forward, then x would be a negative number.
In this case, 25.4mm = 2.54 x 101mm (the decimal place was moved forward once)
Thus, 25.4mm/inch is written as (2.54 x 101mm)/inch in scientific notation
2.54*102
It is 2.54*10^-5.
254
In today's modern notation of Roman numerals: 254 = CCLIV
25/4 = 6 1/4
A quicker way of writing 254 + 254 + 254 is 3 x 254, or three multiplied by 254. The answer is 762.
254 is the mass number of the isotope Fm-254.
254/100 as a decimal is 2.54
-110
You would write is as 254,000,000
254.34 rounded to the nearest whole number is 254
The number 254 itself is not special. There can be many things associated with this particular number. The number 254 can mean something to one person but something completely different to another.