We're dividing 640156 by 91 
We want to figure out the number of times 640156 can be divided by 91.

Going ahead to step 1:
6 divided by 91 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 91

Moving on to step 2:
If we divide 64 by 91, we get 0 and a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 64 to get 64.
Include the next digit (0) from the dividend after 64, then repeat: 640 / 91

Advancing to step 3:
When dividing 640 by 91, we get 7 with a remainder of 3.
The next digit of our result is 7. 
Result so far: 7.0
If we subtract 637 from 640, we get 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 91

Step 4:
31 divided by 91 is 0 with a remainder of 31.
Use 0 as the next digit of our solution. 
Result so far: 70.0
If we take 0 away from 31, we end up with 31.
Fetch the next digit (5) from the dividend, attach it to 31 and continue: 315 / 91

Going ahead to step 5:
The number 91 fits into 315 3 times, leaving a remainder of 42.
Put 3 as the next digit of the answer. 
Result so far: 703.0
If we take 273 away from 315, we end up with 42.
Bring next digit (6) of the dividend behind the 42 and repeat the process: 426 / 91

Moving on to step 6:
When dividing 426 by 91, we get 4 with a remainder of 62.
Use 4 as the next digit of our solution. 
Result so far: 7034.0
If we subtract 364 from 426, we get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

On to step 7:
The number 91 fits into 620 6 times, leaving a remainder of 74.
Record the quotient 6 as the next digit in the result. 
Result so far: 7034.6
If we take 546 away from 620, we end up 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.

Let's proceed to step 8:
The number 91 fits into 740 8 times, leaving a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 7034.68
Subtract 728 from 740 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 9:
91 can be fit into 120 1 times, resulting in a remainder of 29.
Record the quotient 1 as the next digit in the result. 
Result so far: 7034.681
If we subtract 91 from 120, we get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Advancing to step 10:
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: 7034.6813
Subtracting 273 from 290 leaves us with 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 11:
The number 91 fits into 170 1 times, leaving a remainder of 79.
Put 1 as the next digit of the answer. 
Result so far: 7034.68131
Deduct 91 from 170 and we're left 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.

On to step 12:
91 goes into 790 8 times with a remainder of 62.
Put 8 as the next digit of the answer. 
Result so far: 7034.681318
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.

Moving on to step 13:
91 can be fit into 620 6 times, resulting in a remainder of 74.
Write down 6 as next digit of the result. 
Result so far: 7034.6813186
Subtracting 546 from 620 leaves us 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.

Going ahead to step 14:
91 goes into 740 8 times with a remainder of 12.
The next digit of our result is 8. 
Result so far: 7034.68131868
Subtract 728 from 740 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

After the division, we end up with 7034.68131868 and a remainder of 1.2e-08.