Let's divide 21489636 by 478
We want to divide 21489636 by 478.

Let's proceed to step 1:
The number 478 fits into 2 0 times, leaving a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 478

On to step 2:
478 can be fit into 21 0 times, resulting in a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Fetch the next digit (4) from the dividend, attach it to 21 and continue: 214 / 478

On to step 3:
If we divide 214 by 478, we get 0 and a remainder of 214.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 214 to get 214.
Append the next digit (8) from the dividend to 214 and continue with: 2148 / 478

On to step 4:
The number 478 fits into 2148 4 times, leaving a remainder of 236.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtract 1912 from 2148 to get 236.
Append the next digit (9) from the dividend to 236 and continue with: 2369 / 478

Let's proceed to step 5:
478 goes into 2369 4 times with a remainder of 457.
Put 4 as the next digit of the answer. 
Result so far: 44.0
Deduct 1912 from 2369 and we're left with 457.
Fetch the next digit (6) from the dividend, attach it to 457 and continue: 4576 / 478

Advancing to step 6:
When dividing 4576 by 478, we get 9 with a remainder of 274.
Record the quotient 9 as the next digit in the result. 
Result so far: 449.0
The remainder is 274 after subtracting 4302 from 4576.
Fetch the next digit (3) from the dividend, attach it to 274 and continue: 2743 / 478

Advancing to step 7:
478 can be fit into 2743 5 times, resulting in a remainder of 353.
The number 5 becomes the next digit in our result. 
Result so far: 4495.0
Subtract 2390 from 2743 to get 353.
Take the next digit (6) from the dividend and append it to 353, then repeat: 3536 / 478

Advancing to step 8:
When dividing 3536 by 478, we get 7 with a remainder of 190.
Record the quotient 7 as the next digit in the result. 
Result so far: 44957.0
Subtracting 3346 from 3536 leaves us with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Going ahead to step 9:
1900 divided by 478 is 3 with a remainder of 466.
The number 3 becomes the next digit in our result. 
Result so far: 44957.3
If we subtract 1434 from 1900, we get 466.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4660, and continue the process.

On to step 10:
478 goes into 4660 9 times with a remainder of 358.
The next digit of our result is 9. 
Result so far: 44957.39
Subtracting 4302 from 4660 leaves us with 358.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3580, and continue the process.

On to step 11:
478 can be fit into 3580 7 times, resulting in a remainder of 234.
Write down 7 as next digit of the result. 
Result so far: 44957.397
Subtract 3346 from 3580 to get 234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Going ahead to step 12:
If we divide 2340 by 478, we get 4 and a remainder of 428.
Use 4 as the next digit of our solution. 
Result so far: 44957.3974
Subtract 1912 from 2340 to get 428.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

Moving on to step 13:
If we divide 4280 by 478, we get 8 and a remainder of 456.
Write down 8 as next digit of the result. 
Result so far: 44957.39748
If we subtract 3824 from 4280, we get 456.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

Step 14:
478 goes into 4560 9 times with a remainder of 258.
The next digit of our result is 9. 
Result so far: 44957.397489
Subtracting 4302 from 4560 leaves us with 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Going ahead to step 15:
The number 478 fits into 2580 5 times, leaving a remainder of 190.
The number 5 becomes the next digit in our result. 
Result so far: 44957.3974895
If we take 2390 away from 2580, we end up with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Moving on to step 16:
When dividing 1900 by 478, we get 3 with a remainder of 466.
Write down 3 as next digit of the result. 
Result so far: 44957.39748953
Subtracting 1434 from 1900 leaves us with 466.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4660, and continue the process.

The final outcome is 44957.39748953, with a leftover of 4.66e-07.