Let's divide 21159523 by 909
We want to divide 21159523 by 909.

Going ahead to step 1:
2 divided by 909 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 909

On to step 2:
If we divide 21 by 909, we get 0 and a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Take the next digit (1) from the dividend and append it to 21, then repeat: 211 / 909

Let's proceed to step 3:
If we divide 211 by 909, we get 0 and a remainder of 211.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 211 and we're left with 211.
Fetch the next digit (5) from the dividend, attach it to 211 and continue: 2115 / 909

Going ahead to step 4:
909 goes into 2115 2 times with a remainder of 297.
The next digit of our result is 2. 
Result so far: 2.0
If we take 1818 away from 2115, we end up with 297.
Take the next digit (9) from the dividend and append it to 297, then repeat: 2979 / 909

Advancing to step 5:
The number 909 fits into 2979 3 times, leaving a remainder of 252.
Put 3 as the next digit of the answer. 
Result so far: 23.0
If we take 2727 away from 2979, we end up with 252.
Take the next digit (5) from the dividend and append it to 252, then repeat: 2525 / 909

Step 6:
909 goes into 2525 2 times with a remainder of 707.
Put 2 as the next digit of the answer. 
Result so far: 232.0
Deduct 1818 from 2525 and we're left with 707.
Take the next digit (2) from the dividend and append it to 707, then repeat: 7072 / 909

On to step 7:
If we divide 7072 by 909, we get 7 and a remainder of 709.
The number 7 becomes the next digit in our result. 
Result so far: 2327.0
The remainder is 709 after subtracting 6363 from 7072.
Fetch the next digit (3) from the dividend, attach it to 709 and continue: 7093 / 909

On to step 8:
909 can be fit into 7093 7 times, resulting in a remainder of 730.
Put 7 as the next digit of the answer. 
Result so far: 23277.0
The remainder is 730 after subtracting 6363 from 7093.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7300, and continue the process.

Moving on to step 9:
When dividing 7300 by 909, we get 8 with a remainder of 28.
Write down 8 as next digit of the result. 
Result so far: 23277.8
The remainder is 28 after subtracting 7272 from 7300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 10:
When dividing 280 by 909, we get 0 with a remainder of 280.
The next digit of our result is 0. 
Result so far: 23277.8
If we take 0 away from 280, we end up with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Going ahead to step 11:
2800 divided by 909 is 3 with a remainder of 73.
The next digit of our result is 3. 
Result so far: 23277.803
If we subtract 2727 from 2800, we get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Let's proceed to step 12:
If we divide 730 by 909, we get 0 and a remainder of 730.
The next digit of our result is 0. 
Result so far: 23277.803
If we subtract 0 from 730, we get 730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7300, and continue the process.

Going ahead to step 13:
When dividing 7300 by 909, we get 8 with a remainder of 28.
The next digit of our result is 8. 
Result so far: 23277.80308
Subtract 7272 from 7300 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 14:
The number 909 fits into 280 0 times, leaving a remainder of 280.
The next digit of our result is 0. 
Result so far: 23277.80308
The remainder is 280 after subtracting 0 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Going ahead to step 15:
2800 divided by 909 is 3 with a remainder of 73.
Use 3 as the next digit of our solution. 
Result so far: 23277.8030803
Subtracting 2727 from 2800 leaves us with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

On to step 16:
When dividing 730 by 909, we get 0 with a remainder of 730.
Use 0 as the next digit of our solution. 
Result so far: 23277.8030803
The remainder is 730 after subtracting 0 from 730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7300, and continue the process.

Our division results in 23277.8030803 with a remaining 7.3e-07.