21800809 ÷ 171 
We're looking to find how many times 171 goes into 21800809.

Moving on to step 1:
171 can be fit into 2 0 times, resulting in a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 171

Advancing to step 2:
21 divided by 171 is 0 with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Fetch the next digit (8) from the dividend, attach it to 21 and continue: 218 / 171

Let's proceed to step 3:
If we divide 218 by 171, we get 1 and a remainder of 47.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 171 from 218 to get 47.
Take the next digit (0) from the dividend and append it to 47, then repeat: 470 / 171

On to step 4:
470 divided by 171 is 2 with a remainder of 128.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtracting 342 from 470 leaves us with 128.
Append the next digit (0) from the dividend to 128 and continue with: 1280 / 171

On to step 5:
When dividing 1280 by 171, we get 7 with a remainder of 83.
Put 7 as the next digit of the answer. 
Result so far: 127.0
The remainder is 83 after subtracting 1197 from 1280.
Fetch the next digit (8) from the dividend, attach it to 83 and continue: 838 / 171

Step 6:
838 divided by 171 is 4 with a remainder of 154.
Write down 4 as next digit of the result. 
Result so far: 1274.0
Subtract 684 from 838 to get 154.
Include the next digit (0) from the dividend after 154, then repeat: 1540 / 171

Advancing to step 7:
1540 divided by 171 is 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 12749.0
Subtracting 1539 from 1540 leaves us with 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 171

Let's proceed to step 8:
19 divided by 171 is 0 with a remainder of 19.
Use 0 as the next digit of our solution. 
Result so far: 127490.0
Deduct 0 from 19 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 9:
190 divided by 171 is 1 with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 127490.1
Subtracting 171 from 190 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 10:
190 divided by 171 is 1 with a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 127490.11
Deduct 171 from 190 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

In conclusion, the division gives 127490.11 with a balance of 0.019.