478460 divided by 21 
We're looking to find how many times 21 goes into 478460.

Let's proceed to step 1:
4 divided by 21 is 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Grab the next digit (7) from the dividend, add it to 4, then carry on: 47 / 21

On to step 2:
47 divided by 21 is 2 with a remainder of 5.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 42 from 47 to get 5.
Fetch the next digit (8) from the dividend, attach it to 5 and continue: 58 / 21

Let's proceed to step 3:
When dividing 58 by 21, we get 2 with a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 22.0
If we take 42 away from 58, we end up with 16.
Bring next digit (4) of the dividend behind the 16 and repeat the process: 164 / 21

Advancing to step 4:
If we divide 164 by 21, we get 7 and a remainder of 17.
Put 7 as the next digit of the answer. 
Result so far: 227.0
If we take 147 away from 164, we end up with 17.
Fetch the next digit (6) from the dividend, attach it to 17 and continue: 176 / 21

On to step 5:
21 goes into 176 8 times with a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 2278.0
The remainder is 8 after subtracting 168 from 176.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 21

Advancing to step 6:
If we divide 80 by 21, we get 3 and a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 22783.0
Subtract 63 from 80 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 7:
The number 21 fits into 170 8 times, leaving a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 22783.8
Subtracting 168 from 170 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 8:
If we divide 20 by 21, we get 0 and a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 22783.8
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
200 divided by 21 is 9 with a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 22783.809
If we take 189 away from 200, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 10:
110 divided by 21 is 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 22783.8095
If we take 105 away from 110, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 11:
When dividing 50 by 21, we get 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 22783.80952
Deduct 42 from 50 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 12:
80 divided by 21 is 3 with a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 22783.809523
If we take 63 away from 80, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 13:
170 divided by 21 is 8 with a remainder of 2.
The next digit of our result is 8. 
Result so far: 22783.8095238
If we take 168 away from 170, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 14:
20 divided by 21 is 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 22783.8095238
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final result is 22783.8095238 with a remainder of 2e-08.