We're dividing 578140 by 91 
We want to figure out the number of times 578140 can be divided by 91.

On to step 1:
91 goes into 5 0 times with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 91

Moving on to step 2:
91 can be fit into 57 0 times, resulting in a remainder of 57.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 57 after subtracting 0 from 57.
Include the next digit (8) from the dividend after 57, then repeat: 578 / 91

Let's proceed to step 3:
If we divide 578 by 91, we get 6 and a remainder of 32.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtract 546 from 578 to get 32.
Include the next digit (1) from the dividend after 32, then repeat: 321 / 91

On to step 4:
321 divided by 91 is 3 with a remainder of 48.
Put 3 as the next digit of the answer. 
Result so far: 63.0
Subtracting 273 from 321 leaves us with 48.
Take the next digit (4) from the dividend and append it to 48, then repeat: 484 / 91

Moving on to step 5:
91 can be fit into 484 5 times, resulting in a remainder of 29.
The next digit of our result is 5. 
Result so far: 635.0
The remainder is 29 after subtracting 455 from 484.
Fetch the next digit (0) from the dividend, attach it to 29 and continue: 290 / 91

Step 6:
290 divided by 91 is 3 with a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 6353.0
Subtract 273 from 290 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 7:
170 divided by 91 is 1 with a remainder of 79.
The number 1 becomes the next digit in our result. 
Result so far: 6353.1
Subtracting 91 from 170 leaves us with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Going ahead to step 8:
If we divide 790 by 91, we get 8 and a remainder of 62.
Record the quotient 8 as the next digit in the result. 
Result so far: 6353.18
Deduct 728 from 790 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 9:
If we divide 620 by 91, we get 6 and a remainder of 74.
Use 6 as the next digit of our solution. 
Result so far: 6353.186
Deduct 546 from 620 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 10:
If we divide 740 by 91, we get 8 and a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 6353.1868
The remainder is 12 after subtracting 728 from 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 11:
91 can be fit into 120 1 times, resulting in a remainder of 29.
Write down 1 as next digit of the result. 
Result so far: 6353.18681
Deduct 91 from 120 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 12:
If we divide 290 by 91, we get 3 and a remainder of 17.
The next digit of our result is 3. 
Result so far: 6353.186813
The remainder is 17 after subtracting 273 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 13:
The number 91 fits into 170 1 times, leaving a remainder of 79.
Write down 1 as next digit of the result. 
Result so far: 6353.1868131
The remainder is 79 after subtracting 91 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

On to step 14:
790 divided by 91 is 8 with a remainder of 62.
The next digit of our result is 8. 
Result so far: 6353.18681318
If we take 728 away from 790, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

The quotient of the division is 6353.18681318, and the remainder is 6.2e-08.