91578427 divided by 638 
Our goal is to divide 91578427 by 638.

Let's proceed to step 1:
When dividing 9 by 638, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 638

On to step 2:
If we divide 91 by 638, we get 0 and a remainder of 91.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 91 to get 91.
Fetch the next digit (5) from the dividend, attach it to 91 and continue: 915 / 638

Advancing to step 3:
The number 638 fits into 915 1 times, leaving a remainder of 277.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 638 from 915 to get 277.
Take the next digit (7) from the dividend and append it to 277, then repeat: 2777 / 638

Step 4:
If we divide 2777 by 638, we get 4 and a remainder of 225.
Write down 4 as next digit of the result. 
Result so far: 14.0
Subtract 2552 from 2777 to get 225.
Take the next digit (8) from the dividend and append it to 225, then repeat: 2258 / 638

Going ahead to step 5:
638 can be fit into 2258 3 times, resulting in a remainder of 344.
Write down 3 as next digit of the result. 
Result so far: 143.0
Subtracting 1914 from 2258 leaves us with 344.
Include the next digit (4) from the dividend after 344, then repeat: 3444 / 638

On to step 6:
638 can be fit into 3444 5 times, resulting in a remainder of 254.
Use 5 as the next digit of our solution. 
Result so far: 1435.0
Subtract 3190 from 3444 to get 254.
Bring next digit (2) of the dividend behind the 254 and repeat the process: 2542 / 638

Advancing to step 7:
The number 638 fits into 2542 3 times, leaving a remainder of 628.
Use 3 as the next digit of our solution. 
Result so far: 14353.0
The remainder is 628 after subtracting 1914 from 2542.
Grab the next digit (7) from the dividend, add it to 628, then carry on: 6287 / 638

Let's proceed to step 8:
638 goes into 6287 9 times with a remainder of 545.
The next digit of our result is 9. 
Result so far: 143539.0
Deduct 5742 from 6287 and we're left with 545.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5450, and continue the process.

Step 9:
638 goes into 5450 8 times with a remainder of 346.
The number 8 becomes the next digit in our result. 
Result so far: 143539.8
If we take 5104 away from 5450, we end up with 346.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3460, and continue the process.

Moving on to step 10:
638 can be fit into 3460 5 times, resulting in a remainder of 270.
Write down 5 as next digit of the result. 
Result so far: 143539.85
The remainder is 270 after subtracting 3190 from 3460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Advancing to step 11:
The number 638 fits into 2700 4 times, leaving a remainder of 148.
Put 4 as the next digit of the answer. 
Result so far: 143539.854
Subtracting 2552 from 2700 leaves us with 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Let's proceed to step 12:
If we divide 1480 by 638, we get 2 and a remainder of 204.
The next digit of our result is 2. 
Result so far: 143539.8542
The remainder is 204 after subtracting 1276 from 1480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Step 13:
When dividing 2040 by 638, we get 3 with a remainder of 126.
Put 3 as the next digit of the answer. 
Result so far: 143539.85423
If we subtract 1914 from 2040, we get 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Going ahead to step 14:
The number 638 fits into 1260 1 times, leaving a remainder of 622.
Write down 1 as next digit of the result. 
Result so far: 143539.854231
If we subtract 638 from 1260, we get 622.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6220, and continue the process.

Advancing to step 15:
638 goes into 6220 9 times with a remainder of 478.
Write down 9 as next digit of the result. 
Result so far: 143539.8542319
The remainder is 478 after subtracting 5742 from 6220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4780, and continue the process.

Step 16:
4780 divided by 638 is 7 with a remainder of 314.
Use 7 as the next digit of our solution. 
Result so far: 143539.85423197
Subtract 4466 from 4780 to get 314.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3140, and continue the process.

The final outcome is 143539.85423197, with a leftover of 3.14e-07.