Let's divide 81899593 by 518
We want to divide 81899593 by 518.

Step 1:
The number 518 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 518

Moving on to step 2:
518 can be fit into 81 0 times, resulting in a remainder of 81.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Include the next digit (8) from the dividend after 81, then repeat: 818 / 518

Advancing to step 3:
818 divided by 518 is 1 with a remainder of 300.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 518 away from 818, we end up with 300.
Bring next digit (9) of the dividend behind the 300 and repeat the process: 3009 / 518

Let's proceed to step 4:
The number 518 fits into 3009 5 times, leaving a remainder of 419.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Subtracting 2590 from 3009 leaves us with 419.
Grab the next digit (9) from the dividend, add it to 419, then carry on: 4199 / 518

Let's proceed to step 5:
If we divide 4199 by 518, we get 8 and a remainder of 55.
Put 8 as the next digit of the answer. 
Result so far: 158.0
If we take 4144 away from 4199, we end up with 55.
Append the next digit (5) from the dividend to 55 and continue with: 555 / 518

On to step 6:
If we divide 555 by 518, we get 1 and a remainder of 37.
Put 1 as the next digit of the answer. 
Result so far: 1581.0
Deduct 518 from 555 and we're left with 37.
Include the next digit (9) from the dividend after 37, then repeat: 379 / 518

Going ahead to step 7:
When dividing 379 by 518, we get 0 with a remainder of 379.
Use 0 as the next digit of our solution. 
Result so far: 15810.0
Deduct 0 from 379 and we're left with 379.
Include the next digit (3) from the dividend after 379, then repeat: 3793 / 518

Let's proceed to step 8:
518 goes into 3793 7 times with a remainder of 167.
The next digit of our result is 7. 
Result so far: 158107.0
If we subtract 3626 from 3793, we get 167.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1670, and continue the process.

Advancing to step 9:
The number 518 fits into 1670 3 times, leaving a remainder of 116.
The next digit of our result is 3. 
Result so far: 158107.3
If we take 1554 away from 1670, we end up with 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Let's proceed to step 10:
518 can be fit into 1160 2 times, resulting in a remainder of 124.
The number 2 becomes the next digit in our result. 
Result so far: 158107.32
If we subtract 1036 from 1160, we get 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Step 11:
518 goes into 1240 2 times with a remainder of 204.
Put 2 as the next digit of the answer. 
Result so far: 158107.322
If we subtract 1036 from 1240, we get 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

The final result is 158107.322 with a remainder of 0.0204.