We look at the division of 12381372 by 255 
Let's see how many times 255 fits into 12381372.

Let's proceed to step 1:
When dividing 1 by 255, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 255

Going ahead to step 2:
If we divide 12 by 255, we get 0 and a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Append the next digit (3) from the dividend to 12 and continue with: 123 / 255

Moving on to step 3:
The number 255 fits into 123 0 times, leaving a remainder of 123.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 123, we end up with 123.
Include the next digit (8) from the dividend after 123, then repeat: 1238 / 255

Advancing to step 4:
When dividing 1238 by 255, we get 4 with a remainder of 218.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 218 after subtracting 1020 from 1238.
Fetch the next digit (1) from the dividend, attach it to 218 and continue: 2181 / 255

Let's proceed to step 5:
If we divide 2181 by 255, we get 8 and a remainder of 141.
Record the quotient 8 as the next digit in the result. 
Result so far: 48.0
Subtracting 2040 from 2181 leaves us with 141.
Fetch the next digit (3) from the dividend, attach it to 141 and continue: 1413 / 255

Advancing to step 6:
255 goes into 1413 5 times with a remainder of 138.
Put 5 as the next digit of the answer. 
Result so far: 485.0
Subtract 1275 from 1413 to get 138.
Take the next digit (7) from the dividend and append it to 138, then repeat: 1387 / 255

Moving on to step 7:
255 goes into 1387 5 times with a remainder of 112.
Use 5 as the next digit of our solution. 
Result so far: 4855.0
Deduct 1275 from 1387 and we're left with 112.
Take the next digit (2) from the dividend and append it to 112, then repeat: 1122 / 255

Step 8:
When dividing 1122 by 255, we get 4 with a remainder of 102.
Use 4 as the next digit of our solution. 
Result so far: 48554.0
Subtracting 1020 from 1122 leaves us with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Moving on to step 9:
255 goes into 1020 4 times with a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 48554.4
Subtract 1020 from 1020 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 10:
If we divide 0 by 255, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 48554.4
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 11:
0 divided by 255 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 48554.4
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 48554.4 and a remainder of 0.0.