Let's divide 91709135 by 78
We want to figure out the number of times 91709135 can be divided by 78.

Advancing to step 1:
78 can be fit into 9 0 times, resulting in a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 78

Advancing to step 2:
The number 78 fits into 91 1 times, leaving a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 78 away from 91, we end up with 13.
Grab the next digit (7) from the dividend, add it to 13, then carry on: 137 / 78

Step 3:
If we divide 137 by 78, we get 1 and a remainder of 59.
Write down 1 as next digit of the result. 
Result so far: 11.0
Subtracting 78 from 137 leaves us with 59.
Append the next digit (0) from the dividend to 59 and continue with: 590 / 78

Advancing to step 4:
78 goes into 590 7 times with a remainder of 44.
The next digit of our result is 7. 
Result so far: 117.0
If we subtract 546 from 590, we get 44.
Append the next digit (9) from the dividend to 44 and continue with: 449 / 78

Advancing to step 5:
78 can be fit into 449 5 times, resulting in a remainder of 59.
Record the quotient 5 as the next digit in the result. 
Result so far: 1175.0
If we take 390 away from 449, we end up with 59.
Grab the next digit (1) from the dividend, add it to 59, then carry on: 591 / 78

Step 6:
78 goes into 591 7 times with a remainder of 45.
Put 7 as the next digit of the answer. 
Result so far: 11757.0
If we take 546 away from 591, we end up with 45.
Bring next digit (3) of the dividend behind the 45 and repeat the process: 453 / 78

Going ahead to step 7:
78 goes into 453 5 times with a remainder of 63.
Use 5 as the next digit of our solution. 
Result so far: 117575.0
Subtracting 390 from 453 leaves us with 63.
Bring next digit (5) of the dividend behind the 63 and repeat the process: 635 / 78

Moving on to step 8:
If we divide 635 by 78, we get 8 and a remainder of 11.
Record the quotient 8 as the next digit in the result. 
Result so far: 1175758.0
Deduct 624 from 635 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 9:
110 divided by 78 is 1 with a remainder of 32.
Put 1 as the next digit of the answer. 
Result so far: 1175758.1
If we subtract 78 from 110, we get 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 10:
320 divided by 78 is 4 with a remainder of 8.
Put 4 as the next digit of the answer. 
Result so far: 1175758.14
Deduct 312 from 320 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 11:
The number 78 fits into 80 1 times, leaving a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 1175758.141
The remainder is 2 after subtracting 78 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 12:
If we divide 20 by 78, we get 0 and a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 1175758.141
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 13:
If we divide 200 by 78, we get 2 and a remainder of 44.
The number 2 becomes the next digit in our result. 
Result so far: 1175758.14102
Deduct 156 from 200 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.

Moving on to step 14:
If we divide 440 by 78, we get 5 and a remainder of 50.
The next digit of our result is 5. 
Result so far: 1175758.141025
Deduct 390 from 440 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 15:
78 goes into 500 6 times with a remainder of 32.
The next digit of our result is 6. 
Result so far: 1175758.1410256
Deduct 468 from 500 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.

Advancing to step 16:
78 can be fit into 320 4 times, resulting in a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 1175758.14102564
Deduct 312 from 320 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The quotient of the division is 1175758.14102564, and the remainder is 8e-09.