We look at the division of 66942099 by 638 
We're looking to find how many times 638 goes into 66942099.

Advancing to step 1:
638 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 638

Advancing to step 2:
638 can be fit into 66 0 times, resulting in a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Grab the next digit (9) from the dividend, add it to 66, then carry on: 669 / 638

Advancing to step 3:
When dividing 669 by 638, we get 1 with a remainder of 31.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 31 after subtracting 638 from 669.
Grab the next digit (4) from the dividend, add it to 31, then carry on: 314 / 638

On to step 4:
When dividing 314 by 638, we get 0 with a remainder of 314.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we take 0 away from 314, we end up with 314.
Append the next digit (2) from the dividend to 314 and continue with: 3142 / 638

On to step 5:
638 goes into 3142 4 times with a remainder of 590.
Record the quotient 4 as the next digit in the result. 
Result so far: 104.0
The remainder is 590 after subtracting 2552 from 3142.
Include the next digit (0) from the dividend after 590, then repeat: 5900 / 638

Step 6:
5900 divided by 638 is 9 with a remainder of 158.
Record the quotient 9 as the next digit in the result. 
Result so far: 1049.0
The remainder is 158 after subtracting 5742 from 5900.
Take the next digit (9) from the dividend and append it to 158, then repeat: 1589 / 638

Moving on to step 7:
1589 divided by 638 is 2 with a remainder of 313.
Write down 2 as next digit of the result. 
Result so far: 10492.0
Subtract 1276 from 1589 to get 313.
Fetch the next digit (9) from the dividend, attach it to 313 and continue: 3139 / 638

Moving on to step 8:
When dividing 3139 by 638, we get 4 with a remainder of 587.
Write down 4 as next digit of the result. 
Result so far: 104924.0
Deduct 2552 from 3139 and we're left with 587.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5870, and continue the process.

Moving on to step 9:
If we divide 5870 by 638, we get 9 and a remainder of 128.
Record the quotient 9 as the next digit in the result. 
Result so far: 104924.9
The remainder is 128 after subtracting 5742 from 5870.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Going ahead to step 10:
The number 638 fits into 1280 2 times, leaving a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 104924.92
If we subtract 1276 from 1280, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 11:
638 goes into 40 0 times with a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 104924.92
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 12:
The number 638 fits into 400 0 times, leaving a remainder of 400.
Write down 0 as next digit of the result. 
Result so far: 104924.92
If we take 0 away from 400, we end up with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

In conclusion, the division gives 104924.92 with a balance of 0.004.