We're dividing 81891807 by 510 
We want to figure out the number of times 81891807 can be divided by 510.

Moving on to step 1:
The number 510 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
Subtracting 0 from 8 leaves us with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 510

Advancing to step 2:
510 goes into 81 0 times with a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Grab the next digit (8) from the dividend, add it to 81, then carry on: 818 / 510

Step 3:
510 goes into 818 1 times with a remainder of 308.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 510 from 818 leaves us with 308.
Include the next digit (9) from the dividend after 308, then repeat: 3089 / 510

Moving on to step 4:
When dividing 3089 by 510, we get 6 with a remainder of 29.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
If we take 3060 away from 3089, we end up with 29.
Append the next digit (1) from the dividend to 29 and continue with: 291 / 510

Let's proceed to step 5:
When dividing 291 by 510, we get 0 with a remainder of 291.
The next digit of our result is 0. 
Result so far: 160.0
Deduct 0 from 291 and we're left with 291.
Include the next digit (8) from the dividend after 291, then repeat: 2918 / 510

Going ahead to step 6:
510 goes into 2918 5 times with a remainder of 368.
The next digit of our result is 5. 
Result so far: 1605.0
If we subtract 2550 from 2918, we get 368.
Bring next digit (0) of the dividend behind the 368 and repeat the process: 3680 / 510

Advancing to step 7:
When dividing 3680 by 510, we get 7 with a remainder of 110.
The next digit of our result is 7. 
Result so far: 16057.0
Subtract 3570 from 3680 to get 110.
Take the next digit (7) from the dividend and append it to 110, then repeat: 1107 / 510

Going ahead to step 8:
510 goes into 1107 2 times with a remainder of 87.
Put 2 as the next digit of the answer. 
Result so far: 160572.0
If we subtract 1020 from 1107, we get 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Step 9:
When dividing 870 by 510, we get 1 with a remainder of 360.
Put 1 as the next digit of the answer. 
Result so far: 160572.1
If we subtract 510 from 870, we get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Going ahead to step 10:
If we divide 3600 by 510, we get 7 and a remainder of 30.
Write down 7 as next digit of the result. 
Result so far: 160572.17
The remainder is 30 after subtracting 3570 from 3600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 11:
The number 510 fits into 300 0 times, leaving a remainder of 300.
Put 0 as the next digit of the answer. 
Result so far: 160572.17
If we subtract 0 from 300, we get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Let's proceed to step 12:
510 can be fit into 3000 5 times, resulting in a remainder of 450.
Use 5 as the next digit of our solution. 
Result so far: 160572.1705
Subtracting 2550 from 3000 leaves us with 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

On to step 13:
4500 divided by 510 is 8 with a remainder of 420.
Record the quotient 8 as the next digit in the result. 
Result so far: 160572.17058
Subtracting 4080 from 4500 leaves us with 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Step 14:
510 goes into 4200 8 times with a remainder of 120.
Write down 8 as next digit of the result. 
Result so far: 160572.170588
The remainder is 120 after subtracting 4080 from 4200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

In conclusion, the division gives 160572.170588 with a balance of 1.2e-05.