54521691 divided by 668 
Our goal is to divide 54521691 by 668.

Moving on to step 1:
The number 668 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Include the next digit (4) from the dividend after 5, then repeat: 54 / 668

Going ahead to step 2:
54 divided by 668 is 0 with a remainder of 54.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 54 leaves us with 54.
Bring next digit (5) of the dividend behind the 54 and repeat the process: 545 / 668

Going ahead to step 3:
545 divided by 668 is 0 with a remainder of 545.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 545 and we're left with 545.
Append the next digit (2) from the dividend to 545 and continue with: 5452 / 668

Going ahead to step 4:
When dividing 5452 by 668, we get 8 with a remainder of 108.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
If we take 5344 away from 5452, we end up with 108.
Include the next digit (1) from the dividend after 108, then repeat: 1081 / 668

Advancing to step 5:
1081 divided by 668 is 1 with a remainder of 413.
Write down 1 as next digit of the result. 
Result so far: 81.0
The remainder is 413 after subtracting 668 from 1081.
Append the next digit (6) from the dividend to 413 and continue with: 4136 / 668

Advancing to step 6:
668 goes into 4136 6 times with a remainder of 128.
Record the quotient 6 as the next digit in the result. 
Result so far: 816.0
Subtract 4008 from 4136 to get 128.
Append the next digit (9) from the dividend to 128 and continue with: 1289 / 668

Advancing to step 7:
The number 668 fits into 1289 1 times, leaving a remainder of 621.
The number 1 becomes the next digit in our result. 
Result so far: 8161.0
If we subtract 668 from 1289, we get 621.
Include the next digit (1) from the dividend after 621, then repeat: 6211 / 668

Let's proceed to step 8:
6211 divided by 668 is 9 with a remainder of 199.
Write down 9 as next digit of the result. 
Result so far: 81619.0
Subtract 6012 from 6211 to get 199.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1990, and continue the process.

Going ahead to step 9:
1990 divided by 668 is 2 with a remainder of 654.
Use 2 as the next digit of our solution. 
Result so far: 81619.2
Deduct 1336 from 1990 and we're left with 654.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6540, and continue the process.

Step 10:
When dividing 6540 by 668, we get 9 with a remainder of 528.
Use 9 as the next digit of our solution. 
Result so far: 81619.29
The remainder is 528 after subtracting 6012 from 6540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

Let's proceed to step 11:
668 goes into 5280 7 times with a remainder of 604.
Use 7 as the next digit of our solution. 
Result so far: 81619.297
Subtract 4676 from 5280 to get 604.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6040, and continue the process.

Step 12:
6040 divided by 668 is 9 with a remainder of 28.
Record the quotient 9 as the next digit in the result. 
Result so far: 81619.2979
The remainder is 28 after subtracting 6012 from 6040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 13:
The number 668 fits into 280 0 times, leaving a remainder of 280.
Record the quotient 0 as the next digit in the result. 
Result so far: 81619.2979
Subtracting 0 from 280 leaves us with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Step 14:
2800 divided by 668 is 4 with a remainder of 128.
The next digit of our result is 4. 
Result so far: 81619.297904
Subtracting 2672 from 2800 leaves us with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Going ahead to step 15:
When dividing 1280 by 668, we get 1 with a remainder of 612.
Record the quotient 1 as the next digit in the result. 
Result so far: 81619.2979041
Subtract 668 from 1280 to get 612.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6120, and continue the process.

On to step 16:
If we divide 6120 by 668, we get 9 and a remainder of 108.
The next digit of our result is 9. 
Result so far: 81619.29790419
Deduct 6012 from 6120 and we're left with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

In conclusion, the division gives 81619.29790419 with a balance of 1.08e-07.