Let's divide 978849 by 21
Our goal is to divide 978849 by 21.

Advancing to step 1:
21 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Take the next digit (7) from the dividend and append it to 9, then repeat: 97 / 21

On to step 2:
The number 21 fits into 97 4 times, leaving a remainder of 13.
Put 4 as the next digit of the answer. 
Result so far: 4.0
The remainder is 13 after subtracting 84 from 97.
Bring next digit (8) of the dividend behind the 13 and repeat the process: 138 / 21

Moving on to step 3:
21 can be fit into 138 6 times, resulting in a remainder of 12.
The next digit of our result is 6. 
Result so far: 46.0
If we subtract 126 from 138, we get 12.
Fetch the next digit (8) from the dividend, attach it to 12 and continue: 128 / 21

Advancing to step 4:
21 can be fit into 128 6 times, resulting in a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 466.0
Subtract 126 from 128 to get 2.
Append the next digit (4) from the dividend to 2 and continue with: 24 / 21

Let's proceed to step 5:
21 goes into 24 1 times with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 4661.0
Subtracting 21 from 24 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 21

Let's proceed to step 6:
When dividing 39 by 21, we get 1 with a remainder of 18.
Write down 1 as next digit of the result. 
Result so far: 46611.0
The remainder is 18 after subtracting 21 from 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 7:
21 goes into 180 8 times with a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 46611.8
Deduct 168 from 180 and we're left 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.

Going ahead to step 8:
The number 21 fits into 120 5 times, leaving a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 46611.85
The remainder is 15 after subtracting 105 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 9:
The number 21 fits into 150 7 times, leaving a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 46611.857
Deduct 147 from 150 and we're left 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.

Moving on to step 10:
21 can be fit into 30 1 times, resulting in a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 46611.8571
Subtract 21 from 30 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 11:
21 can be fit into 90 4 times, resulting in a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 46611.85714
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.

Going ahead to step 12:
21 goes into 60 2 times with a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 46611.857142
Deduct 42 from 60 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 13:
21 can be fit into 180 8 times, resulting in a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 46611.8571428
Subtracting 168 from 180 leaves us 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.

Moving on to step 14:
The number 21 fits into 120 5 times, leaving a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 46611.85714285
Deduct 105 from 120 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

After the division, we end up with 46611.85714285 and a remainder of 1.5e-08.