215589 divided by 81 
We want to figure out the number of times 215589 can be divided by 81.

On to step 1:
When dividing 2 by 81, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 81

Advancing to step 2:
The number 81 fits into 21 0 times, leaving a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Take the next digit (5) from the dividend and append it to 21, then repeat: 215 / 81

Step 3:
If we divide 215 by 81, we get 2 and a remainder of 53.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 53 after subtracting 162 from 215.
Bring next digit (5) of the dividend behind the 53 and repeat the process: 535 / 81

Let's proceed to step 4:
81 can be fit into 535 6 times, resulting in a remainder of 49.
Record the quotient 6 as the next digit in the result. 
Result so far: 26.0
The remainder is 49 after subtracting 486 from 535.
Include the next digit (8) from the dividend after 49, then repeat: 498 / 81

Let's proceed to step 5:
The number 81 fits into 498 6 times, leaving a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 266.0
If we take 486 away from 498, we end up with 12.
Take the next digit (9) from the dividend and append it to 12, then repeat: 129 / 81

Step 6:
81 goes into 129 1 times with a remainder of 48.
Use 1 as the next digit of our solution. 
Result so far: 2661.0
The remainder is 48 after subtracting 81 from 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 7:
If we divide 480 by 81, we get 5 and a remainder of 75.
The next digit of our result is 5. 
Result so far: 2661.5
Subtracting 405 from 480 leaves us with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Moving on to step 8:
81 goes into 750 9 times with a remainder of 21.
Put 9 as the next digit of the answer. 
Result so far: 2661.59
Deduct 729 from 750 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 9:
81 can be fit into 210 2 times, resulting in a remainder of 48.
Record the quotient 2 as the next digit in the result. 
Result so far: 2661.592
The remainder is 48 after subtracting 162 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 10:
If we divide 480 by 81, we get 5 and a remainder of 75.
Record the quotient 5 as the next digit in the result. 
Result so far: 2661.5925
If we take 405 away from 480, we end up with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Step 11:
The number 81 fits into 750 9 times, leaving a remainder of 21.
The number 9 becomes the next digit in our result. 
Result so far: 2661.59259
Deduct 729 from 750 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 12:
81 goes into 210 2 times with a remainder of 48.
Write down 2 as next digit of the result. 
Result so far: 2661.592592
The remainder is 48 after subtracting 162 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 13:
81 goes into 480 5 times with a remainder of 75.
Record the quotient 5 as the next digit in the result. 
Result so far: 2661.5925925
The remainder is 75 after subtracting 405 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

On to step 14:
81 goes into 750 9 times with a remainder of 21.
Write down 9 as next digit of the result. 
Result so far: 2661.59259259
Deduct 729 from 750 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

The final result is 2661.59259259 with a remainder of 2.1e-08.