We divide 21376421 by 638
Our goal is to divide 21376421 by 638.

Moving on to step 1:
2 divided by 638 is 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 638

Advancing to step 2:
638 goes into 21 0 times with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Include the next digit (3) from the dividend after 21, then repeat: 213 / 638

Step 3:
213 divided by 638 is 0 with a remainder of 213.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 213, we end up with 213.
Fetch the next digit (7) from the dividend, attach it to 213 and continue: 2137 / 638

Let's proceed to step 4:
When dividing 2137 by 638, we get 3 with a remainder of 223.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 1914 from 2137 to get 223.
Fetch the next digit (6) from the dividend, attach it to 223 and continue: 2236 / 638

On to step 5:
The number 638 fits into 2236 3 times, leaving a remainder of 322.
Record the quotient 3 as the next digit in the result. 
Result so far: 33.0
The remainder is 322 after subtracting 1914 from 2236.
Bring next digit (4) of the dividend behind the 322 and repeat the process: 3224 / 638

Moving on to step 6:
The number 638 fits into 3224 5 times, leaving a remainder of 34.
Write down 5 as next digit of the result. 
Result so far: 335.0
Subtracting 3190 from 3224 leaves us with 34.
Take the next digit (2) from the dividend and append it to 34, then repeat: 342 / 638

Moving on to step 7:
638 goes into 342 0 times with a remainder of 342.
The next digit of our result is 0. 
Result so far: 3350.0
If we subtract 0 from 342, we get 342.
Fetch the next digit (1) from the dividend, attach it to 342 and continue: 3421 / 638

Step 8:
When dividing 3421 by 638, we get 5 with a remainder of 231.
Put 5 as the next digit of the answer. 
Result so far: 33505.0
If we subtract 3190 from 3421, we get 231.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2310, and continue the process.

Moving on to step 9:
638 goes into 2310 3 times with a remainder of 396.
The next digit of our result is 3. 
Result so far: 33505.3
Deduct 1914 from 2310 and we're left with 396.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

Let's proceed to step 10:
The number 638 fits into 3960 6 times, leaving a remainder of 132.
Use 6 as the next digit of our solution. 
Result so far: 33505.36
If we subtract 3828 from 3960, we get 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Let's proceed to step 11:
1320 divided by 638 is 2 with a remainder of 44.
Record the quotient 2 as the next digit in the result. 
Result so far: 33505.362
If we subtract 1276 from 1320, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Moving on to step 12:
If we divide 440 by 638, we get 0 and a remainder of 440.
Record the quotient 0 as the next digit in the result. 
Result so far: 33505.362
Subtract 0 from 440 to get 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Moving on to step 13:
When dividing 4400 by 638, we get 6 with a remainder of 572.
Put 6 as the next digit of the answer. 
Result so far: 33505.36206
Subtracting 3828 from 4400 leaves us with 572.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5720, and continue the process.

Advancing to step 14:
638 can be fit into 5720 8 times, resulting in a remainder of 616.
The next digit of our result is 8. 
Result so far: 33505.362068
If we take 5104 away from 5720, we end up with 616.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

Step 15:
If we divide 6160 by 638, we get 9 and a remainder of 418.
The number 9 becomes the next digit in our result. 
Result so far: 33505.3620689
If we subtract 5742 from 6160, we get 418.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

Step 16:
The number 638 fits into 4180 6 times, leaving a remainder of 352.
Put 6 as the next digit of the answer. 
Result so far: 33505.36206896
Subtract 3828 from 4180 to get 352.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

After the division, we end up with 33505.36206896 and a remainder of 3.52e-07.