We look at the division of 986944 by 21 
We want to divide 986944 by 21.

Advancing to step 1:
21 can be fit into 9 0 times, resulting in a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 21

Moving on to step 2:
When dividing 98 by 21, we get 4 with a remainder of 14.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 14 after subtracting 84 from 98.
Fetch the next digit (6) from the dividend, attach it to 14 and continue: 146 / 21

Moving on to step 3:
The number 21 fits into 146 6 times, leaving a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 46.0
Deduct 126 from 146 and we're left with 20.
Append the next digit (9) from the dividend to 20 and continue with: 209 / 21

Moving on to step 4:
The number 21 fits into 209 9 times, leaving a remainder of 20.
Write down 9 as next digit of the result. 
Result so far: 469.0
If we take 189 away from 209, we end up with 20.
Append the next digit (4) from the dividend to 20 and continue with: 204 / 21

Let's proceed to step 5:
21 can be fit into 204 9 times, resulting in a remainder of 15.
The next digit of our result is 9. 
Result so far: 4699.0
If we subtract 189 from 204, we get 15.
Append the next digit (4) from the dividend to 15 and continue with: 154 / 21

Advancing to step 6:
21 goes into 154 7 times with a remainder of 7.
Use 7 as the next digit of our solution. 
Result so far: 46997.0
If we subtract 147 from 154, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 7:
The number 21 fits into 70 3 times, leaving a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 46997.3
Subtract 63 from 70 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 8:
21 can be fit into 70 3 times, resulting in a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 46997.33
If we take 63 away from 70, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Our division results in 46997.33 with a remaining 0.007.