We're dividing 99557459 by 638 
We want to figure out the number of times 99557459 can be divided by 638.

Step 1:
638 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 638

Let's proceed to step 2:
If we divide 99 by 638, we get 0 and a remainder of 99.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 99 after subtracting 0 from 99.
Include the next digit (5) from the dividend after 99, then repeat: 995 / 638

Going ahead to step 3:
The number 638 fits into 995 1 times, leaving a remainder of 357.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 638 from 995 to get 357.
Fetch the next digit (5) from the dividend, attach it to 357 and continue: 3575 / 638

Going ahead to step 4:
3575 divided by 638 is 5 with a remainder of 385.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Deduct 3190 from 3575 and we're left with 385.
Grab the next digit (7) from the dividend, add it to 385, then carry on: 3857 / 638

Advancing to step 5:
638 goes into 3857 6 times with a remainder of 29.
Put 6 as the next digit of the answer. 
Result so far: 156.0
Subtracting 3828 from 3857 leaves us with 29.
Append the next digit (4) from the dividend to 29 and continue with: 294 / 638

Moving on to step 6:
638 can be fit into 294 0 times, resulting in a remainder of 294.
The number 0 becomes the next digit in our result. 
Result so far: 1560.0
The remainder is 294 after subtracting 0 from 294.
Append the next digit (5) from the dividend to 294 and continue with: 2945 / 638

Advancing to step 7:
638 can be fit into 2945 4 times, resulting in a remainder of 393.
Record the quotient 4 as the next digit in the result. 
Result so far: 15604.0
Subtracting 2552 from 2945 leaves us with 393.
Append the next digit (9) from the dividend to 393 and continue with: 3939 / 638

Advancing to step 8:
The number 638 fits into 3939 6 times, leaving a remainder of 111.
Put 6 as the next digit of the answer. 
Result so far: 156046.0
The remainder is 111 after subtracting 3828 from 3939.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

On to step 9:
1110 divided by 638 is 1 with a remainder of 472.
Put 1 as the next digit of the answer. 
Result so far: 156046.1
Deduct 638 from 1110 and we're left with 472.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

Moving on to step 10:
638 goes into 4720 7 times with a remainder of 254.
Record the quotient 7 as the next digit in the result. 
Result so far: 156046.17
The remainder is 254 after subtracting 4466 from 4720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Step 11:
The number 638 fits into 2540 3 times, leaving a remainder of 626.
The next digit of our result is 3. 
Result so far: 156046.173
Deduct 1914 from 2540 and we're left with 626.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

Going ahead to step 12:
When dividing 6260 by 638, we get 9 with a remainder of 518.
The next digit of our result is 9. 
Result so far: 156046.1739
If we take 5742 away from 6260, we end up with 518.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5180, and continue the process.

Advancing to step 13:
638 can be fit into 5180 8 times, resulting in a remainder of 76.
Use 8 as the next digit of our solution. 
Result so far: 156046.17398
Subtracting 5104 from 5180 leaves us with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 14:
638 goes into 760 1 times with a remainder of 122.
The number 1 becomes the next digit in our result. 
Result so far: 156046.173981
The remainder is 122 after subtracting 638 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Step 15:
1220 divided by 638 is 1 with a remainder of 582.
The number 1 becomes the next digit in our result. 
Result so far: 156046.1739811
If we take 638 away from 1220, we end up with 582.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5820, and continue the process.

The final outcome is 156046.1739811, with a leftover of 5.82e-06.