We look at the division of 54126463 by 803 
Let's see how many times 803 fits into 54126463.

Let's proceed to step 1:
803 can be fit into 5 0 times, resulting in a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Take the next digit (4) from the dividend and append it to 5, then repeat: 54 / 803

Going ahead to step 2:
54 divided by 803 is 0 with a remainder of 54.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 54 and we're left with 54.
Grab the next digit (1) from the dividend, add it to 54, then carry on: 541 / 803

On to step 3:
541 divided by 803 is 0 with a remainder of 541.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 541 after subtracting 0 from 541.
Include the next digit (2) from the dividend after 541, then repeat: 5412 / 803

On to step 4:
When dividing 5412 by 803, we get 6 with a remainder of 594.
Write down 6 as next digit of the result. 
Result so far: 6.0
Deduct 4818 from 5412 and we're left with 594.
Grab the next digit (6) from the dividend, add it to 594, then carry on: 5946 / 803

Going ahead to step 5:
When dividing 5946 by 803, we get 7 with a remainder of 325.
Use 7 as the next digit of our solution. 
Result so far: 67.0
If we take 5621 away from 5946, we end up with 325.
Grab the next digit (4) from the dividend, add it to 325, then carry on: 3254 / 803

On to step 6:
When dividing 3254 by 803, we get 4 with a remainder of 42.
Use 4 as the next digit of our solution. 
Result so far: 674.0
If we subtract 3212 from 3254, we get 42.
Fetch the next digit (6) from the dividend, attach it to 42 and continue: 426 / 803

Going ahead to step 7:
803 can be fit into 426 0 times, resulting in a remainder of 426.
Write down 0 as next digit of the result. 
Result so far: 6740.0
The remainder is 426 after subtracting 0 from 426.
Bring next digit (3) of the dividend behind the 426 and repeat the process: 4263 / 803

On to step 8:
803 can be fit into 4263 5 times, resulting in a remainder of 248.
Record the quotient 5 as the next digit in the result. 
Result so far: 67405.0
If we take 4015 away from 4263, we end up with 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Moving on to step 9:
803 can be fit into 2480 3 times, resulting in a remainder of 71.
Use 3 as the next digit of our solution. 
Result so far: 67405.3
If we take 2409 away from 2480, we end up with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Step 10:
803 goes into 710 0 times with a remainder of 710.
Put 0 as the next digit of the answer. 
Result so far: 67405.3
The remainder is 710 after subtracting 0 from 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7100, and continue the process.

Let's proceed to step 11:
803 goes into 7100 8 times with a remainder of 676.
Record the quotient 8 as the next digit in the result. 
Result so far: 67405.308
If we subtract 6424 from 7100, we get 676.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6760, and continue the process.

Advancing to step 12:
6760 divided by 803 is 8 with a remainder of 336.
The number 8 becomes the next digit in our result. 
Result so far: 67405.3088
Deduct 6424 from 6760 and we're left with 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

After the division, we end up with 67405.3088 and a remainder of 0.00336.