128863 divided by 91 
We want to figure out the number of times 128863 can be divided by 91.

On to step 1:
91 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 91

Moving on to step 2:
When dividing 12 by 91, we get 0 with a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Take the next digit (8) from the dividend and append it to 12, then repeat: 128 / 91

Moving on to step 3:
When dividing 128 by 91, we get 1 with a remainder of 37.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 91 from 128, we get 37.
Append the next digit (8) from the dividend to 37 and continue with: 378 / 91

Advancing to step 4:
91 goes into 378 4 times with a remainder of 14.
The next digit of our result is 4. 
Result so far: 14.0
Subtracting 364 from 378 leaves us with 14.
Bring next digit (6) of the dividend behind the 14 and repeat the process: 146 / 91

Let's proceed to step 5:
91 goes into 146 1 times with a remainder of 55.
The number 1 becomes the next digit in our result. 
Result so far: 141.0
Deduct 91 from 146 and we're left with 55.
Take the next digit (3) from the dividend and append it to 55, then repeat: 553 / 91

Let's proceed to step 6:
When dividing 553 by 91, we get 6 with a remainder of 7.
Write down 6 as next digit of the result. 
Result so far: 1416.0
If we subtract 546 from 553, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 7:
The number 91 fits into 70 0 times, leaving a remainder of 70.
Write down 0 as next digit of the result. 
Result so far: 1416.0
Subtract 0 from 70 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 8:
When dividing 700 by 91, we get 7 with a remainder of 63.
The number 7 becomes the next digit in our result. 
Result so far: 1416.07
Subtracting 637 from 700 leaves us with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Step 9:
630 divided by 91 is 6 with a remainder of 84.
Use 6 as the next digit of our solution. 
Result so far: 1416.076
Subtracting 546 from 630 leaves us with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

On to step 10:
The number 91 fits into 840 9 times, leaving a remainder of 21.
Record the quotient 9 as the next digit in the result. 
Result so far: 1416.0769
The remainder is 21 after subtracting 819 from 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 11:
91 can be fit into 210 2 times, resulting in a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 1416.07692
Deduct 182 from 210 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 12:
280 divided by 91 is 3 with a remainder of 7.
The next digit of our result is 3. 
Result so far: 1416.076923
If we take 273 away from 280, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 13:
If we divide 70 by 91, we get 0 and a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 1416.076923
Subtracting 0 from 70 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 14:
If we divide 700 by 91, we get 7 and a remainder of 63.
Put 7 as the next digit of the answer. 
Result so far: 1416.07692307
If we subtract 637 from 700, we get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

The final outcome is 1416.07692307, with a leftover of 6.3e-08.