81396991 divided by 687 
Let's see how many times 687 fits into 81396991.

Step 1:
If we divide 8 by 687, we get 0 and 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.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 687

Advancing to step 2:
If we divide 81 by 687, we get 0 and a remainder of 81.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Grab the next digit (3) from the dividend, add it to 81, then carry on: 813 / 687

Let's proceed to step 3:
813 divided by 687 is 1 with a remainder of 126.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 687 from 813 leaves us with 126.
Grab the next digit (9) from the dividend, add it to 126, then carry on: 1269 / 687

On to step 4:
The number 687 fits into 1269 1 times, leaving a remainder of 582.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
If we take 687 away from 1269, we end up with 582.
Grab the next digit (6) from the dividend, add it to 582, then carry on: 5826 / 687

Moving on to step 5:
687 goes into 5826 8 times with a remainder of 330.
The number 8 becomes the next digit in our result. 
Result so far: 118.0
Subtracting 5496 from 5826 leaves us with 330.
Take the next digit (9) from the dividend and append it to 330, then repeat: 3309 / 687

Going ahead to step 6:
687 goes into 3309 4 times with a remainder of 561.
The next digit of our result is 4. 
Result so far: 1184.0
The remainder is 561 after subtracting 2748 from 3309.
Include the next digit (9) from the dividend after 561, then repeat: 5619 / 687

Step 7:
5619 divided by 687 is 8 with a remainder of 123.
The next digit of our result is 8. 
Result so far: 11848.0
Deduct 5496 from 5619 and we're left with 123.
Fetch the next digit (1) from the dividend, attach it to 123 and continue: 1231 / 687

Advancing to step 8:
687 can be fit into 1231 1 times, resulting in a remainder of 544.
Put 1 as the next digit of the answer. 
Result so far: 118481.0
Subtracting 687 from 1231 leaves us with 544.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5440, and continue the process.

Moving on to step 9:
When dividing 5440 by 687, we get 7 with a remainder of 631.
Put 7 as the next digit of the answer. 
Result so far: 118481.7
If we take 4809 away from 5440, we end up with 631.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6310, and continue the process.

Advancing to step 10:
687 can be fit into 6310 9 times, resulting in a remainder of 127.
The next digit of our result is 9. 
Result so far: 118481.79
Deduct 6183 from 6310 and we're left with 127.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1270, and continue the process.

Advancing to step 11:
If we divide 1270 by 687, we get 1 and a remainder of 583.
The next digit of our result is 1. 
Result so far: 118481.791
If we take 687 away from 1270, we end up with 583.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5830, and continue the process.

Let's proceed to step 12:
687 goes into 5830 8 times with a remainder of 334.
The number 8 becomes the next digit in our result. 
Result so far: 118481.7918
If we subtract 5496 from 5830, we get 334.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3340, and continue the process.

Moving on to step 13:
If we divide 3340 by 687, we get 4 and a remainder of 592.
Write down 4 as next digit of the result. 
Result so far: 118481.79184
Deduct 2748 from 3340 and we're left with 592.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5920, and continue the process.

Advancing to step 14:
When dividing 5920 by 687, we get 8 with a remainder of 424.
The number 8 becomes the next digit in our result. 
Result so far: 118481.791848
The remainder is 424 after subtracting 5496 from 5920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

Going ahead to step 15:
687 can be fit into 4240 6 times, resulting in a remainder of 118.
The number 6 becomes the next digit in our result. 
Result so far: 118481.7918486
The remainder is 118 after subtracting 4122 from 4240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Advancing to step 16:
687 goes into 1180 1 times with a remainder of 493.
Use 1 as the next digit of our solution. 
Result so far: 118481.79184861
Deduct 687 from 1180 and we're left with 493.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4930, and continue the process.

The final outcome is 118481.79184861, with a leftover of 4.93e-07.