478932 divided by 21 
Our goal is to divide 478932 by 21.

Moving on to step 1:
21 goes into 4 0 times with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Grab the next digit (7) from the dividend, add it to 4, then carry on: 47 / 21

Advancing to step 2:
When dividing 47 by 21, we get 2 with a remainder of 5.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 42 from 47 and we're left with 5.
Append the next digit (8) from the dividend to 5 and continue with: 58 / 21

Going ahead to step 3:
If we divide 58 by 21, we get 2 and a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 22.0
If we subtract 42 from 58, we get 16.
Include the next digit (9) from the dividend after 16, then repeat: 169 / 21

On to step 4:
169 divided by 21 is 8 with a remainder of 1.
Put 8 as the next digit of the answer. 
Result so far: 228.0
The remainder is 1 after subtracting 168 from 169.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 21

Advancing to step 5:
If we divide 13 by 21, we get 0 and a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 2280.0
Subtract 0 from 13 to get 13.
Bring next digit (2) of the dividend behind the 13 and repeat the process: 132 / 21

Step 6:
21 goes into 132 6 times with a remainder of 6.
The next digit of our result is 6. 
Result so far: 22806.0
If we take 126 away from 132, we end up 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 7:
If we divide 60 by 21, we get 2 and a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 22806.2
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.

Let's proceed to step 8:
The number 21 fits into 180 8 times, leaving a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 22806.28
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.

Advancing to step 9:
When dividing 120 by 21, we get 5 with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 22806.285
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.

On to step 10:
21 goes into 150 7 times with a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 22806.2857
The remainder is 3 after subtracting 147 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 11:
30 divided by 21 is 1 with a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 22806.28571
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.

Moving on to step 12:
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: 22806.285714
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.

Moving on to step 13:
The number 21 fits into 60 2 times, leaving a remainder of 18.
The next digit of our result is 2. 
Result so far: 22806.2857142
If we subtract 42 from 60, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 14:
180 divided by 21 is 8 with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 22806.28571428
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.

The final result is 22806.28571428 with a remainder of 1.2e-08.