We look at the division of 54503901 by 255 
Let's see how many times 255 fits into 54503901.

Advancing to step 1:
255 goes into 5 0 times with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Bring next digit (4) of the dividend behind the 5 and repeat the process: 54 / 255

Step 2:
When dividing 54 by 255, we get 0 with a remainder of 54.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 54, we get 54.
Include the next digit (5) from the dividend after 54, then repeat: 545 / 255

Step 3:
If we divide 545 by 255, we get 2 and a remainder of 35.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 510 from 545 leaves us with 35.
Fetch the next digit (0) from the dividend, attach it to 35 and continue: 350 / 255

Advancing to step 4:
255 goes into 350 1 times with a remainder of 95.
The next digit of our result is 1. 
Result so far: 21.0
If we take 255 away from 350, we end up with 95.
Grab the next digit (3) from the dividend, add it to 95, then carry on: 953 / 255

Going ahead to step 5:
If we divide 953 by 255, we get 3 and a remainder of 188.
The number 3 becomes the next digit in our result. 
Result so far: 213.0
Subtracting 765 from 953 leaves us with 188.
Grab the next digit (9) from the dividend, add it to 188, then carry on: 1889 / 255

On to step 6:
When dividing 1889 by 255, we get 7 with a remainder of 104.
The next digit of our result is 7. 
Result so far: 2137.0
The remainder is 104 after subtracting 1785 from 1889.
Bring next digit (0) of the dividend behind the 104 and repeat the process: 1040 / 255

Advancing to step 7:
If we divide 1040 by 255, we get 4 and a remainder of 20.
Put 4 as the next digit of the answer. 
Result so far: 21374.0
Subtract 1020 from 1040 to get 20.
Take the next digit (1) from the dividend and append it to 20, then repeat: 201 / 255

Advancing to step 8:
201 divided by 255 is 0 with a remainder of 201.
The number 0 becomes the next digit in our result. 
Result so far: 213740.0
If we take 0 away from 201, we end up with 201.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2010, and continue the process.

Advancing to step 9:
When dividing 2010 by 255, we get 7 with a remainder of 225.
Write down 7 as next digit of the result. 
Result so far: 213740.7
Deduct 1785 from 2010 and we're left with 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Going ahead to step 10:
When dividing 2250 by 255, we get 8 with a remainder of 210.
Write down 8 as next digit of the result. 
Result so far: 213740.78
Subtracting 2040 from 2250 leaves us with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Going ahead to step 11:
255 goes into 2100 8 times with a remainder of 60.
Put 8 as the next digit of the answer. 
Result so far: 213740.788
Subtracting 2040 from 2100 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

The final outcome is 213740.788, with a leftover of 0.006.