We're dividing 851515 by 81 
We want to figure out the number of times 851515 can be divided by 81.

Going ahead to step 1:
8 divided by 81 is 0 with 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.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 81

Going ahead to step 2:
81 can be fit into 85 1 times, resulting in a remainder of 4.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 81 from 85 to get 4.
Append the next digit (1) from the dividend to 4 and continue with: 41 / 81

Moving on to step 3:
If we divide 41 by 81, we get 0 and a remainder of 41.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtracting 0 from 41 leaves us with 41.
Include the next digit (5) from the dividend after 41, then repeat: 415 / 81

Let's proceed to step 4:
The number 81 fits into 415 5 times, leaving a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 105.0
The remainder is 10 after subtracting 405 from 415.
Grab the next digit (1) from the dividend, add it to 10, then carry on: 101 / 81

Going ahead to step 5:
If we divide 101 by 81, we get 1 and a remainder of 20.
Write down 1 as next digit of the result. 
Result so far: 1051.0
If we take 81 away from 101, we end up with 20.
Bring next digit (5) of the dividend behind the 20 and repeat the process: 205 / 81

Step 6:
When dividing 205 by 81, we get 2 with a remainder of 43.
Use 2 as the next digit of our solution. 
Result so far: 10512.0
Subtract 162 from 205 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Step 7:
81 goes into 430 5 times with a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 10512.5
Subtract 405 from 430 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 8:
250 divided by 81 is 3 with a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 10512.53
If we subtract 243 from 250, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 9:
81 goes into 70 0 times with a remainder of 70.
Put 0 as the next digit of the answer. 
Result so far: 10512.53
The remainder is 70 after subtracting 0 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 10:
81 can be fit into 700 8 times, resulting in a remainder of 52.
Use 8 as the next digit of our solution. 
Result so far: 10512.5308
Deduct 648 from 700 and we're left 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.

Going ahead to step 11:
The number 81 fits into 520 6 times, leaving a remainder of 34.
Use 6 as the next digit of our solution. 
Result so far: 10512.53086
Subtracting 486 from 520 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 12:
81 goes into 340 4 times with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 10512.530864
Deduct 324 from 340 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 13:
The number 81 fits into 160 1 times, leaving a remainder of 79.
The number 1 becomes the next digit in our result. 
Result so far: 10512.5308641
Deduct 81 from 160 and we're left with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Going ahead to step 14:
The number 81 fits into 790 9 times, leaving a remainder of 61.
Use 9 as the next digit of our solution. 
Result so far: 10512.53086419
Subtracting 729 from 790 leaves us with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Our division results in 10512.53086419 with a remaining 6.1e-08.