Let's divide 645531 by 91
We're looking to find how many times 91 goes into 645531.

Let's proceed to step 1:
If we divide 6 by 91, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 91

Step 2:
64 divided by 91 is 0 with a remainder of 64.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Fetch the next digit (5) from the dividend, attach it to 64 and continue: 645 / 91

Step 3:
The number 91 fits into 645 7 times, leaving a remainder of 8.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtract 637 from 645 to get 8.
Bring next digit (5) of the dividend behind the 8 and repeat the process: 85 / 91

Moving on to step 4:
91 can be fit into 85 0 times, resulting in a remainder of 85.
Record the quotient 0 as the next digit in the result. 
Result so far: 70.0
Deduct 0 from 85 and we're left with 85.
Grab the next digit (3) from the dividend, add it to 85, then carry on: 853 / 91

On to step 5:
The number 91 fits into 853 9 times, leaving a remainder of 34.
Write down 9 as next digit of the result. 
Result so far: 709.0
The remainder is 34 after subtracting 819 from 853.
Include the next digit (1) from the dividend after 34, then repeat: 341 / 91

Let's proceed to step 6:
The number 91 fits into 341 3 times, leaving a remainder of 68.
Put 3 as the next digit of the answer. 
Result so far: 7093.0
Subtract 273 from 341 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Going ahead to step 7:
If we divide 680 by 91, we get 7 and a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 7093.7
If we subtract 637 from 680, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Moving on to step 8:
91 can be fit into 430 4 times, resulting in a remainder of 66.
The number 4 becomes the next digit in our result. 
Result so far: 7093.74
Subtract 364 from 430 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 9:
91 can be fit into 660 7 times, resulting in a remainder of 23.
Record the quotient 7 as the next digit in the result. 
Result so far: 7093.747
Deduct 637 from 660 and we're left with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 10:
If we divide 230 by 91, we get 2 and a remainder of 48.
Write down 2 as next digit of the result. 
Result so far: 7093.7472
If we take 182 away from 230, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 11:
When dividing 480 by 91, we get 5 with a remainder of 25.
The next digit of our result is 5. 
Result so far: 7093.74725
If we take 455 away from 480, we end up 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.

Going ahead to step 12:
250 divided by 91 is 2 with a remainder of 68.
Use 2 as the next digit of our solution. 
Result so far: 7093.747252
The remainder is 68 after subtracting 182 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Advancing to step 13:
91 can be fit into 680 7 times, resulting in a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 7093.7472527
Deduct 637 from 680 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 14:
If we divide 430 by 91, we get 4 and a remainder of 66.
Write down 4 as next digit of the result. 
Result so far: 7093.74725274
Deduct 364 from 430 and we're left with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

In conclusion, the division gives 7093.74725274 with a balance of 6.6e-08.