We're dividing 838969 by 21 
Let's see how many times 21 fits into 838969.

Going ahead to step 1:
When dividing 8 by 21, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (3) from the dividend, add it to 8, then carry on: 83 / 21

Moving on to step 2:
21 can be fit into 83 3 times, resulting in a remainder of 20.
The next digit of our result is 3. 
Result so far: 3.0
Subtracting 63 from 83 leaves us with 20.
Include the next digit (8) from the dividend after 20, then repeat: 208 / 21

On to step 3:
21 can be fit into 208 9 times, resulting in a remainder of 19.
The next digit of our result is 9. 
Result so far: 39.0
Subtracting 189 from 208 leaves us with 19.
Append the next digit (9) from the dividend to 19 and continue with: 199 / 21

Step 4:
21 can be fit into 199 9 times, resulting in a remainder of 10.
Use 9 as the next digit of our solution. 
Result so far: 399.0
If we take 189 away from 199, we end up with 10.
Fetch the next digit (6) from the dividend, attach it to 10 and continue: 106 / 21

Let's proceed to step 5:
21 can be fit into 106 5 times, resulting in a remainder of 1.
Use 5 as the next digit of our solution. 
Result so far: 3995.0
Deduct 105 from 106 and we're left with 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 21

Advancing to step 6:
21 goes into 19 0 times with a remainder of 19.
Put 0 as the next digit of the answer. 
Result so far: 39950.0
If we subtract 0 from 19, we get 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 7:
When dividing 190 by 21, we get 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 39950.9
Subtract 189 from 190 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 8:
When dividing 10 by 21, we get 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 39950.9
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 9:
21 can be fit into 100 4 times, resulting in a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 39950.904
Subtracting 84 from 100 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.

Let's proceed to step 10:
When dividing 160 by 21, we get 7 with a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 39950.9047
Subtracting 147 from 160 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 11:
The number 21 fits into 130 6 times, leaving a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 39950.90476
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 12:
The number 21 fits into 40 1 times, leaving a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 39950.904761
Subtracting 21 from 40 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.

Let's proceed to step 13:
21 can be fit into 190 9 times, resulting in a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 39950.9047619
If we subtract 189 from 190, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 14:
The number 21 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 39950.9047619
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 39950.9047619 and a remainder of 1e-08.