Let's divide 79103004 by 638
Our goal is to divide 79103004 by 638.

Advancing to step 1:
If we divide 7 by 638, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Append the next digit (9) from the dividend to 7 and continue with: 79 / 638

On to step 2:
638 goes into 79 0 times with a remainder of 79.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 79, we get 79.
Grab the next digit (1) from the dividend, add it to 79, then carry on: 791 / 638

On to step 3:
638 goes into 791 1 times with a remainder of 153.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 638 from 791 and we're left with 153.
Include the next digit (0) from the dividend after 153, then repeat: 1530 / 638

Advancing to step 4:
The number 638 fits into 1530 2 times, leaving a remainder of 254.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Subtracting 1276 from 1530 leaves us with 254.
Include the next digit (3) from the dividend after 254, then repeat: 2543 / 638

Let's proceed to step 5:
638 goes into 2543 3 times with a remainder of 629.
Write down 3 as next digit of the result. 
Result so far: 123.0
If we subtract 1914 from 2543, we get 629.
Append the next digit (0) from the dividend to 629 and continue with: 6290 / 638

On to step 6:
638 goes into 6290 9 times with a remainder of 548.
Write down 9 as next digit of the result. 
Result so far: 1239.0
If we take 5742 away from 6290, we end up with 548.
Append the next digit (0) from the dividend to 548 and continue with: 5480 / 638

Moving on to step 7:
If we divide 5480 by 638, we get 8 and a remainder of 376.
Put 8 as the next digit of the answer. 
Result so far: 12398.0
If we subtract 5104 from 5480, we get 376.
Append the next digit (4) from the dividend to 376 and continue with: 3764 / 638

Advancing to step 8:
When dividing 3764 by 638, we get 5 with a remainder of 574.
Put 5 as the next digit of the answer. 
Result so far: 123985.0
Subtracting 3190 from 3764 leaves us with 574.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5740, and continue the process.

Step 9:
When dividing 5740 by 638, we get 8 with a remainder of 636.
The number 8 becomes the next digit in our result. 
Result so far: 123985.8
Subtracting 5104 from 5740 leaves us with 636.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6360, and continue the process.

Step 10:
The number 638 fits into 6360 9 times, leaving a remainder of 618.
Record the quotient 9 as the next digit in the result. 
Result so far: 123985.89
If we take 5742 away from 6360, we end up with 618.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6180, and continue the process.

Step 11:
6180 divided by 638 is 9 with a remainder of 438.
The number 9 becomes the next digit in our result. 
Result so far: 123985.899
Subtracting 5742 from 6180 leaves us with 438.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4380, and continue the process.

The final outcome is 123985.899, with a leftover of 0.0438.