Let's divide 644836 by 91
We want to divide 644836 by 91.

Going ahead to step 1:
91 can be fit into 6 0 times, resulting in 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.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 91

Going ahead to step 2:
64 divided by 91 is 0 with a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Append the next digit (4) from the dividend to 64 and continue with: 644 / 91

Let's proceed to step 3:
The number 91 fits into 644 7 times, leaving a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
If we take 637 away from 644, we end up with 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 91

Going ahead to step 4:
91 goes into 78 0 times with a remainder of 78.
Use 0 as the next digit of our solution. 
Result so far: 70.0
The remainder is 78 after subtracting 0 from 78.
Append the next digit (3) from the dividend to 78 and continue with: 783 / 91

Let's proceed to step 5:
91 goes into 783 8 times with a remainder of 55.
The next digit of our result is 8. 
Result so far: 708.0
Subtracting 728 from 783 leaves us with 55.
Include the next digit (6) from the dividend after 55, then repeat: 556 / 91

Advancing to step 6:
91 can be fit into 556 6 times, resulting in a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 7086.0
Subtract 546 from 556 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 7:
100 divided by 91 is 1 with a remainder of 9.
The next digit of our result is 1. 
Result so far: 7086.1
Subtracting 91 from 100 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 8:
The number 91 fits into 90 0 times, leaving a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 7086.1
If we take 0 away from 90, we end up with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Advancing to step 9:
The number 91 fits into 900 9 times, leaving a remainder of 81.
The number 9 becomes the next digit in our result. 
Result so far: 7086.109
Deduct 819 from 900 and we're left with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Going ahead to step 10:
When dividing 810 by 91, we get 8 with a remainder of 82.
Put 8 as the next digit of the answer. 
Result so far: 7086.1098
If we subtract 728 from 810, we get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Going ahead to step 11:
91 can be fit into 820 9 times, resulting in a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 7086.10989
If we take 819 away from 820, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 12:
The number 91 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 7086.10989
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 13:
When dividing 100 by 91, we get 1 with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 7086.1098901
The remainder is 9 after subtracting 91 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 14:
91 can be fit into 90 0 times, resulting in a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 7086.1098901
If we subtract 0 from 90, we get 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

In conclusion, the division gives 7086.1098901 with a balance of 9e-08.