13859218 ÷ 638 
We're looking to find how many times 638 goes into 13859218.

Moving on to step 1:
When dividing 1 by 638, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 638

Advancing to step 2:
When dividing 13 by 638, we get 0 with a remainder of 13.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 13 leaves us with 13.
Grab the next digit (8) from the dividend, add it to 13, then carry on: 138 / 638

Step 3:
When dividing 138 by 638, we get 0 with a remainder of 138.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 138, we get 138.
Append the next digit (5) from the dividend to 138 and continue with: 1385 / 638

Moving on to step 4:
The number 638 fits into 1385 2 times, leaving a remainder of 109.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 1276 from 1385 leaves us with 109.
Include the next digit (9) from the dividend after 109, then repeat: 1099 / 638

Step 5:
638 can be fit into 1099 1 times, resulting in a remainder of 461.
Use 1 as the next digit of our solution. 
Result so far: 21.0
Deduct 638 from 1099 and we're left with 461.
Append the next digit (2) from the dividend to 461 and continue with: 4612 / 638

Going ahead to step 6:
The number 638 fits into 4612 7 times, leaving a remainder of 146.
Record the quotient 7 as the next digit in the result. 
Result so far: 217.0
Subtracting 4466 from 4612 leaves us with 146.
Bring next digit (1) of the dividend behind the 146 and repeat the process: 1461 / 638

Going ahead to step 7:
When dividing 1461 by 638, we get 2 with a remainder of 185.
Use 2 as the next digit of our solution. 
Result so far: 2172.0
The remainder is 185 after subtracting 1276 from 1461.
Include the next digit (8) from the dividend after 185, then repeat: 1858 / 638

On to step 8:
When dividing 1858 by 638, we get 2 with a remainder of 582.
Use 2 as the next digit of our solution. 
Result so far: 21722.0
Subtract 1276 from 1858 to get 582.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5820, and continue the process.

Going ahead to step 9:
638 can be fit into 5820 9 times, resulting in a remainder of 78.
Put 9 as the next digit of the answer. 
Result so far: 21722.9
Subtract 5742 from 5820 to get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

On to step 10:
638 goes into 780 1 times with a remainder of 142.
Write down 1 as next digit of the result. 
Result so far: 21722.91
Deduct 638 from 780 and we're left with 142.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

On to step 11:
The number 638 fits into 1420 2 times, leaving a remainder of 144.
The number 2 becomes the next digit in our result. 
Result so far: 21722.912
If we take 1276 away from 1420, we end up with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Let's proceed to step 12:
The number 638 fits into 1440 2 times, leaving a remainder of 164.
Use 2 as the next digit of our solution. 
Result so far: 21722.9122
Subtract 1276 from 1440 to get 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Our division results in 21722.9122 with a remaining 0.00164.