We look at the division of 8783578 by 91 
We're looking to find how many times 91 goes into 8783578.

Going ahead to step 1:
8 divided by 91 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 91

Let's proceed to step 2:
87 divided by 91 is 0 with a remainder of 87.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 87 and we're left with 87.
Fetch the next digit (8) from the dividend, attach it to 87 and continue: 878 / 91

Going ahead to step 3:
If we divide 878 by 91, we get 9 and a remainder of 59.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtracting 819 from 878 leaves us with 59.
Include the next digit (3) from the dividend after 59, then repeat: 593 / 91

Step 4:
91 can be fit into 593 6 times, resulting in a remainder of 47.
Use 6 as the next digit of our solution. 
Result so far: 96.0
Subtract 546 from 593 to get 47.
Include the next digit (5) from the dividend after 47, then repeat: 475 / 91

Let's proceed to step 5:
91 can be fit into 475 5 times, resulting in a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 965.0
Subtracting 455 from 475 leaves us with 20.
Take the next digit (7) from the dividend and append it to 20, then repeat: 207 / 91

Going ahead to step 6:
When dividing 207 by 91, we get 2 with a remainder of 25.
The next digit of our result is 2. 
Result so far: 9652.0
The remainder is 25 after subtracting 182 from 207.
Bring next digit (8) of the dividend behind the 25 and repeat the process: 258 / 91

Moving on to step 7:
If we divide 258 by 91, we get 2 and a remainder of 76.
Record the quotient 2 as the next digit in the result. 
Result so far: 96522.0
If we subtract 182 from 258, we get 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 8:
The number 91 fits into 760 8 times, leaving a remainder of 32.
The next digit of our result is 8. 
Result so far: 96522.8
Deduct 728 from 760 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 9:
91 can be fit into 320 3 times, resulting in a remainder of 47.
Put 3 as the next digit of the answer. 
Result so far: 96522.83
Subtract 273 from 320 to get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Step 10:
91 goes into 470 5 times with a remainder of 15.
The next digit of our result is 5. 
Result so far: 96522.835
Subtracting 455 from 470 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 11:
When dividing 150 by 91, we get 1 with a remainder of 59.
The next digit of our result is 1. 
Result so far: 96522.8351
Subtract 91 from 150 to get 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

On to step 12:
590 divided by 91 is 6 with a remainder of 44.
Put 6 as the next digit of the answer. 
Result so far: 96522.83516
Deduct 546 from 590 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

On to step 13:
91 goes into 440 4 times with a remainder of 76.
The number 4 becomes the next digit in our result. 
Result so far: 96522.835164
The remainder is 76 after subtracting 364 from 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Moving on to step 14:
760 divided by 91 is 8 with a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 96522.8351648
If we take 728 away from 760, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 15:
91 goes into 320 3 times with a remainder of 47.
The next digit of our result is 3. 
Result so far: 96522.83516483
If we subtract 273 from 320, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

After the division, we end up with 96522.83516483 and a remainder of 4.7e-08.