879640 ÷ 81 
We want to figure out the number of times 879640 can be divided by 81.

Going ahead to step 1:
The number 81 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 81

Moving on to step 2:
81 can be fit into 87 1 times, resulting in a remainder of 6.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 81 from 87 to get 6.
Take the next digit (9) from the dividend and append it to 6, then repeat: 69 / 81

Let's proceed to step 3:
81 can be fit into 69 0 times, resulting in a remainder of 69.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we take 0 away from 69, we end up with 69.
Fetch the next digit (6) from the dividend, attach it to 69 and continue: 696 / 81

Step 4:
696 divided by 81 is 8 with a remainder of 48.
The number 8 becomes the next digit in our result. 
Result so far: 108.0
If we subtract 648 from 696, we get 48.
Fetch the next digit (4) from the dividend, attach it to 48 and continue: 484 / 81

Advancing to step 5:
484 divided by 81 is 5 with a remainder of 79.
The next digit of our result is 5. 
Result so far: 1085.0
Subtracting 405 from 484 leaves us with 79.
Include the next digit (0) from the dividend after 79, then repeat: 790 / 81

Going ahead to step 6:
81 can be fit into 790 9 times, resulting in a remainder of 61.
Record the quotient 9 as the next digit in the result. 
Result so far: 10859.0
The remainder is 61 after subtracting 729 from 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Advancing to step 7:
When dividing 610 by 81, we get 7 with a remainder of 43.
Use 7 as the next digit of our solution. 
Result so far: 10859.7
Subtract 567 from 610 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 8:
When dividing 430 by 81, we get 5 with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 10859.75
If we subtract 405 from 430, we 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 9:
250 divided by 81 is 3 with a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 10859.753
Subtracting 243 from 250 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 10:
When dividing 70 by 81, we get 0 with a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 10859.753
Subtract 0 from 70 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 11:
When dividing 700 by 81, we get 8 with a remainder of 52.
The next digit of our result is 8. 
Result so far: 10859.75308
The remainder is 52 after subtracting 648 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 12:
When dividing 520 by 81, we get 6 with a remainder of 34.
Write down 6 as next digit of the result. 
Result so far: 10859.753086
Subtract 486 from 520 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 13:
81 can be fit into 340 4 times, resulting in a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 10859.7530864
Subtracting 324 from 340 leaves us 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.

Moving on to step 14:
The number 81 fits into 160 1 times, leaving a remainder of 79.
The next digit of our result is 1. 
Result so far: 10859.75308641
The remainder is 79 after subtracting 81 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

The final outcome is 10859.75308641, with a leftover of 7.9e-08.