We're dividing 209621 by 81 
We want to figure out the number of times 209621 can be divided by 81.

On to step 1:
The number 81 fits into 2 0 times, leaving a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 81

Step 2:
20 divided by 81 is 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 20 and we're left with 20.
Include the next digit (9) from the dividend after 20, then repeat: 209 / 81

Step 3:
81 goes into 209 2 times with a remainder of 47.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 162 from 209 leaves us with 47.
Fetch the next digit (6) from the dividend, attach it to 47 and continue: 476 / 81

Going ahead to step 4:
If we divide 476 by 81, we get 5 and a remainder of 71.
The next digit of our result is 5. 
Result so far: 25.0
If we take 405 away from 476, we end up with 71.
Fetch the next digit (2) from the dividend, attach it to 71 and continue: 712 / 81

Going ahead to step 5:
81 can be fit into 712 8 times, resulting in a remainder of 64.
The next digit of our result is 8. 
Result so far: 258.0
Subtracting 648 from 712 leaves us with 64.
Take the next digit (1) from the dividend and append it to 64, then repeat: 641 / 81

Step 6:
641 divided by 81 is 7 with a remainder of 74.
Use 7 as the next digit of our solution. 
Result so far: 2587.0
Deduct 567 from 641 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Let's proceed to step 7:
81 can be fit into 740 9 times, resulting in a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 2587.9
Subtracting 729 from 740 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 8:
When dividing 110 by 81, we get 1 with a remainder of 29.
The next digit of our result is 1. 
Result so far: 2587.91
Subtract 81 from 110 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 9:
290 divided by 81 is 3 with a remainder of 47.
Use 3 as the next digit of our solution. 
Result so far: 2587.913
If we subtract 243 from 290, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 10:
The number 81 fits into 470 5 times, leaving a remainder of 65.
The next digit of our result is 5. 
Result so far: 2587.9135
Deduct 405 from 470 and we're left with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Step 11:
81 can be fit into 650 8 times, resulting in a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 2587.91358
Subtract 648 from 650 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 12:
81 can be fit into 20 0 times, resulting in a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 2587.91358
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 13:
81 goes into 200 2 times with a remainder of 38.
Write down 2 as next digit of the result. 
Result so far: 2587.9135802
The remainder is 38 after subtracting 162 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 14:
The number 81 fits into 380 4 times, leaving a remainder of 56.
Write down 4 as next digit of the result. 
Result so far: 2587.91358024
If we subtract 324 from 380, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

In conclusion, the division gives 2587.91358024 with a balance of 5.6e-08.