We look at the division of 91519 by 78 
We want to figure out the number of times 91519 can be divided by 78.

On to step 1:
If we divide 9 by 78, we get 0 and a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 78

Moving on to step 2:
When dividing 91 by 78, we get 1 with a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 78 from 91 leaves us with 13.
Bring next digit (5) of the dividend behind the 13 and repeat the process: 135 / 78

Advancing to step 3:
When dividing 135 by 78, we get 1 with a remainder of 57.
Write down 1 as next digit of the result. 
Result so far: 11.0
Subtract 78 from 135 to get 57.
Include the next digit (1) from the dividend after 57, then repeat: 571 / 78

Going ahead to step 4:
The number 78 fits into 571 7 times, leaving a remainder of 25.
Use 7 as the next digit of our solution. 
Result so far: 117.0
Subtract 546 from 571 to get 25.
Include the next digit (9) from the dividend after 25, then repeat: 259 / 78

Let's proceed to step 5:
When dividing 259 by 78, we get 3 with a remainder of 25.
Record the quotient 3 as the next digit in the result. 
Result so far: 1173.0
Subtracting 234 from 259 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 6:
78 can be fit into 250 3 times, resulting in a remainder of 16.
Use 3 as the next digit of our solution. 
Result so far: 1173.3
Subtract 234 from 250 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 7:
78 can be fit into 160 2 times, resulting in a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 1173.32
The remainder is 4 after subtracting 156 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 8:
The number 78 fits into 40 0 times, leaving a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 1173.32
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 9:
400 divided by 78 is 5 with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 1173.3205
Subtracting 390 from 400 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 10:
The number 78 fits into 100 1 times, leaving a remainder of 22.
Write down 1 as next digit of the result. 
Result so far: 1173.32051
If we subtract 78 from 100, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 11:
78 goes into 220 2 times with a remainder of 64.
Record the quotient 2 as the next digit in the result. 
Result so far: 1173.320512
Subtracting 156 from 220 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 12:
If we divide 640 by 78, we get 8 and a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 1173.3205128
Deduct 624 from 640 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 13:
160 divided by 78 is 2 with a remainder of 4.
The next digit of our result is 2. 
Result so far: 1173.32051282
Subtracting 156 from 160 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

After the division, we end up with 1173.32051282 and a remainder of 4e-09.