81808893 divided by 668 
Our goal is to divide 81808893 by 668.

On to step 1:
668 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 668

On to step 2:
81 divided by 668 is 0 with a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Include the next digit (8) from the dividend after 81, then repeat: 818 / 668

Advancing to step 3:
If we divide 818 by 668, we get 1 and a remainder of 150.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 668 from 818 leaves us with 150.
Grab the next digit (0) from the dividend, add it to 150, then carry on: 1500 / 668

Let's proceed to step 4:
The number 668 fits into 1500 2 times, leaving a remainder of 164.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we take 1336 away from 1500, we end up with 164.
Fetch the next digit (8) from the dividend, attach it to 164 and continue: 1648 / 668

On to step 5:
The number 668 fits into 1648 2 times, leaving a remainder of 312.
Write down 2 as next digit of the result. 
Result so far: 122.0
Subtract 1336 from 1648 to get 312.
Take the next digit (8) from the dividend and append it to 312, then repeat: 3128 / 668

Going ahead to step 6:
The number 668 fits into 3128 4 times, leaving a remainder of 456.
The next digit of our result is 4. 
Result so far: 1224.0
The remainder is 456 after subtracting 2672 from 3128.
Include the next digit (9) from the dividend after 456, then repeat: 4569 / 668

Moving on to step 7:
If we divide 4569 by 668, we get 6 and a remainder of 561.
Write down 6 as next digit of the result. 
Result so far: 12246.0
If we subtract 4008 from 4569, we get 561.
Bring next digit (3) of the dividend behind the 561 and repeat the process: 5613 / 668

On to step 8:
If we divide 5613 by 668, we get 8 and a remainder of 269.
Record the quotient 8 as the next digit in the result. 
Result so far: 122468.0
If we take 5344 away from 5613, we end up with 269.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2690, and continue the process.

Advancing to step 9:
When dividing 2690 by 668, we get 4 with a remainder of 18.
Write down 4 as next digit of the result. 
Result so far: 122468.4
The remainder is 18 after subtracting 2672 from 2690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 10:
668 goes into 180 0 times with a remainder of 180.
Use 0 as the next digit of our solution. 
Result so far: 122468.4
If we take 0 away from 180, we end up with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Going ahead to step 11:
668 goes into 1800 2 times with a remainder of 464.
Write down 2 as next digit of the result. 
Result so far: 122468.402
The remainder is 464 after subtracting 1336 from 1800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

Advancing to step 12:
If we divide 4640 by 668, we get 6 and a remainder of 632.
The next digit of our result is 6. 
Result so far: 122468.4026
Deduct 4008 from 4640 and we're left with 632.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6320, and continue the process.

Step 13:
6320 divided by 668 is 9 with a remainder of 308.
The next digit of our result is 9. 
Result so far: 122468.40269
The remainder is 308 after subtracting 6012 from 6320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

Moving on to step 14:
When dividing 3080 by 668, we get 4 with a remainder of 408.
The number 4 becomes the next digit in our result. 
Result so far: 122468.402694
The remainder is 408 after subtracting 2672 from 3080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

On to step 15:
The number 668 fits into 4080 6 times, leaving a remainder of 72.
Write down 6 as next digit of the result. 
Result so far: 122468.4026946
Subtracting 4008 from 4080 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 16:
If we divide 720 by 668, we get 1 and a remainder of 52.
Write down 1 as next digit of the result. 
Result so far: 122468.40269461
Subtracting 668 from 720 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

The final result is 122468.40269461 with a remainder of 5.2e-08.