We're dividing 54123 by 16 
We want to divide 54123 by 16.

On to step 1:
16 can be fit into 5 0 times, resulting in a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 16

Let's proceed to step 2:
16 goes into 54 3 times with a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 48 from 54 leaves us with 6.
Include the next digit (1) from the dividend after 6, then repeat: 61 / 16

On to step 3:
When dividing 61 by 16, we get 3 with a remainder of 13.
The next digit of our result is 3. 
Result so far: 33.0
Subtract 48 from 61 to get 13.
Include the next digit (2) from the dividend after 13, then repeat: 132 / 16

Advancing to step 4:
132 divided by 16 is 8 with a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 338.0
Subtract 128 from 132 to get 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 16

Advancing to step 5:
16 can be fit into 43 2 times, resulting in a remainder of 11.
Record the quotient 2 as the next digit in the result. 
Result so far: 3382.0
Subtract 32 from 43 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 6:
When dividing 110 by 16, we get 6 with a remainder of 14.
The next digit of our result is 6. 
Result so far: 3382.6
Deduct 96 from 110 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 7:
16 can be fit into 140 8 times, resulting in a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 3382.68
Subtract 128 from 140 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 8:
120 divided by 16 is 7 with a remainder of 8.
Put 7 as the next digit of the answer. 
Result so far: 3382.687
If we subtract 112 from 120, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 9:
The number 16 fits into 80 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 3382.6875
Subtract 80 from 80 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.

Moving on to step 10:
When dividing 0 by 16, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 3382.6875
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.

Step 11:
0 divided by 16 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 3382.6875
Deduct 0 from 0 and we're left with 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 3382.6875 and a remainder of 0.0.