We're dividing 21638199 by 438 
Our goal is to divide 21638199 by 438.

On to step 1:
The number 438 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 438

Step 2:
When dividing 21 by 438, we get 0 with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Take the next digit (6) from the dividend and append it to 21, then repeat: 216 / 438

Step 3:
216 divided by 438 is 0 with a remainder of 216.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 216, we end up with 216.
Bring next digit (3) of the dividend behind the 216 and repeat the process: 2163 / 438

Advancing to step 4:
2163 divided by 438 is 4 with a remainder of 411.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtracting 1752 from 2163 leaves us with 411.
Include the next digit (8) from the dividend after 411, then repeat: 4118 / 438

On to step 5:
4118 divided by 438 is 9 with a remainder of 176.
Use 9 as the next digit of our solution. 
Result so far: 49.0
Deduct 3942 from 4118 and we're left with 176.
Append the next digit (1) from the dividend to 176 and continue with: 1761 / 438

Let's proceed to step 6:
The number 438 fits into 1761 4 times, leaving a remainder of 9.
Record the quotient 4 as the next digit in the result. 
Result so far: 494.0
Subtracting 1752 from 1761 leaves us with 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 438

Going ahead to step 7:
99 divided by 438 is 0 with a remainder of 99.
Put 0 as the next digit of the answer. 
Result so far: 4940.0
If we subtract 0 from 99, we get 99.
Append the next digit (9) from the dividend to 99 and continue with: 999 / 438

Moving on to step 8:
438 can be fit into 999 2 times, resulting in a remainder of 123.
The next digit of our result is 2. 
Result so far: 49402.0
Deduct 876 from 999 and we're left with 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1230, and continue the process.

Moving on to step 9:
1230 divided by 438 is 2 with a remainder of 354.
The number 2 becomes the next digit in our result. 
Result so far: 49402.2
If we subtract 876 from 1230, we get 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

Step 10:
If we divide 3540 by 438, we get 8 and a remainder of 36.
Write down 8 as next digit of the result. 
Result so far: 49402.28
If we take 3504 away from 3540, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 11:
438 goes into 360 0 times with a remainder of 360.
Use 0 as the next digit of our solution. 
Result so far: 49402.28
Subtract 0 from 360 to get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Advancing to step 12:
The number 438 fits into 3600 8 times, leaving a remainder of 96.
Put 8 as the next digit of the answer. 
Result so far: 49402.2808
If we take 3504 away from 3600, we end up with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Let's proceed to step 13:
When dividing 960 by 438, we get 2 with a remainder of 84.
Record the quotient 2 as the next digit in the result. 
Result so far: 49402.28082
The remainder is 84 after subtracting 876 from 960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Let's proceed to step 14:
840 divided by 438 is 1 with a remainder of 402.
Put 1 as the next digit of the answer. 
Result so far: 49402.280821
The remainder is 402 after subtracting 438 from 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

On to step 15:
If we divide 4020 by 438, we get 9 and a remainder of 78.
The number 9 becomes the next digit in our result. 
Result so far: 49402.2808219
Subtracting 3942 from 4020 leaves us with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Moving on to step 16:
When dividing 780 by 438, we get 1 with a remainder of 342.
Record the quotient 1 as the next digit in the result. 
Result so far: 49402.28082191
If we subtract 438 from 780, we get 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

The final result is 49402.28082191 with a remainder of 3.42e-07.