646943 divided by 91 
Let's see how many times 91 fits into 646943.

On to step 1:
The number 91 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 91

Moving on to step 2:
91 can be fit into 64 0 times, resulting in a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Include the next digit (6) from the dividend after 64, then repeat: 646 / 91

Going ahead to step 3:
The number 91 fits into 646 7 times, leaving a remainder of 9.
The next digit of our result is 7. 
Result so far: 7.0
If we subtract 637 from 646, we get 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 91

On to step 4:
The number 91 fits into 99 1 times, leaving a remainder of 8.
The next digit of our result is 1. 
Result so far: 71.0
If we take 91 away from 99, we end up with 8.
Append the next digit (4) from the dividend to 8 and continue with: 84 / 91

On to step 5:
When dividing 84 by 91, we get 0 with a remainder of 84.
Record the quotient 0 as the next digit in the result. 
Result so far: 710.0
If we subtract 0 from 84, we get 84.
Take the next digit (3) from the dividend and append it to 84, then repeat: 843 / 91

Moving on to step 6:
843 divided by 91 is 9 with a remainder of 24.
The number 9 becomes the next digit in our result. 
Result so far: 7109.0
If we subtract 819 from 843, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 7:
91 goes into 240 2 times with a remainder of 58.
The next digit of our result is 2. 
Result so far: 7109.2
Subtracting 182 from 240 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 8:
91 can be fit into 580 6 times, resulting in a remainder of 34.
Use 6 as the next digit of our solution. 
Result so far: 7109.26
Subtracting 546 from 580 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 9:
When dividing 340 by 91, we get 3 with a remainder of 67.
The next digit of our result is 3. 
Result so far: 7109.263
Deduct 273 from 340 and we're left with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Moving on to step 10:
91 goes into 670 7 times with a remainder of 33.
Put 7 as the next digit of the answer. 
Result so far: 7109.2637
Subtract 637 from 670 to get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 11:
91 goes into 330 3 times with a remainder of 57.
Use 3 as the next digit of our solution. 
Result so far: 7109.26373
The remainder is 57 after subtracting 273 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Moving on to step 12:
91 can be fit into 570 6 times, resulting in a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 7109.263736
The remainder is 24 after subtracting 546 from 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 13:
The number 91 fits into 240 2 times, leaving a remainder of 58.
The number 2 becomes the next digit in our result. 
Result so far: 7109.2637362
Subtract 182 from 240 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 14:
91 can be fit into 580 6 times, resulting in a remainder of 34.
Record the quotient 6 as the next digit in the result. 
Result so far: 7109.26373626
If we subtract 546 from 580, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

After the division, we end up with 7109.26373626 and a remainder of 3.4e-08.