Let's divide 837084 by 21
We want to figure out the number of times 837084 can be divided by 21.

Going ahead to step 1:
21 can be fit into 8 0 times, resulting in a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (3) of the dividend behind the 8 and repeat the process: 83 / 21

On to step 2:
83 divided by 21 is 3 with a remainder of 20.
The next digit of our result is 3. 
Result so far: 3.0
If we take 63 away from 83, we end up with 20.
Grab the next digit (7) from the dividend, add it to 20, then carry on: 207 / 21

Step 3:
21 can be fit into 207 9 times, resulting in a remainder of 18.
Put 9 as the next digit of the answer. 
Result so far: 39.0
If we take 189 away from 207, we end up with 18.
Include the next digit (0) from the dividend after 18, then repeat: 180 / 21

Let's proceed to step 4:
21 can be fit into 180 8 times, resulting in a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 398.0
If we subtract 168 from 180, we get 12.
Take the next digit (8) from the dividend and append it to 12, then repeat: 128 / 21

Advancing to step 5:
If we divide 128 by 21, we get 6 and a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 3986.0
The remainder is 2 after subtracting 126 from 128.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 21

Let's proceed to step 6:
If we divide 24 by 21, we get 1 and a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 39861.0
If we subtract 21 from 24, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 7:
If we divide 30 by 21, we get 1 and a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 39861.1
Deduct 21 from 30 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 8:
The number 21 fits into 90 4 times, leaving a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 39861.14
Deduct 84 from 90 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 9:
When dividing 60 by 21, we get 2 with a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 39861.142
The remainder is 18 after subtracting 42 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 10:
21 goes into 180 8 times with a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 39861.1428
If we take 168 away from 180, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 11:
If we divide 120 by 21, we get 5 and a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 39861.14285
Subtract 105 from 120 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 12:
When dividing 150 by 21, we get 7 with a remainder of 3.
The next digit of our result is 7. 
Result so far: 39861.142857
Subtracting 147 from 150 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 13:
30 divided by 21 is 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 39861.1428571
If we take 21 away from 30, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 14:
If we divide 90 by 21, we get 4 and a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 39861.14285714
Deduct 84 from 90 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Our division results in 39861.14285714 with a remaining 6e-09.