644899 ÷ 83 
We want to figure out the number of times 644899 can be divided by 83.

On to step 1:
83 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 83

Let's proceed to step 2:
83 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
Subtracting 0 from 64 leaves us with 64.
Bring next digit (4) of the dividend behind the 64 and repeat the process: 644 / 83

Moving on to step 3:
83 goes into 644 7 times with a remainder of 63.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we take 581 away from 644, we end up with 63.
Include the next digit (8) from the dividend after 63, then repeat: 638 / 83

Going ahead to step 4:
When dividing 638 by 83, we get 7 with a remainder of 57.
Record the quotient 7 as the next digit in the result. 
Result so far: 77.0
If we subtract 581 from 638, we get 57.
Fetch the next digit (9) from the dividend, attach it to 57 and continue: 579 / 83

Moving on to step 5:
83 can be fit into 579 6 times, resulting in a remainder of 81.
The next digit of our result is 6. 
Result so far: 776.0
If we take 498 away from 579, we end up with 81.
Include the next digit (9) from the dividend after 81, then repeat: 819 / 83

Let's proceed to step 6:
If we divide 819 by 83, we get 9 and a remainder of 72.
The number 9 becomes the next digit in our result. 
Result so far: 7769.0
If we take 747 away from 819, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 7:
720 divided by 83 is 8 with a remainder of 56.
Record the quotient 8 as the next digit in the result. 
Result so far: 7769.8
If we subtract 664 from 720, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 8:
When dividing 560 by 83, we get 6 with a remainder of 62.
The number 6 becomes the next digit in our result. 
Result so far: 7769.86
If we take 498 away from 560, 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.

On to step 9:
620 divided by 83 is 7 with a remainder of 39.
Use 7 as the next digit of our solution. 
Result so far: 7769.867
Subtract 581 from 620 to get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 10:
83 goes into 390 4 times with a remainder of 58.
Put 4 as the next digit of the answer. 
Result so far: 7769.8674
If we take 332 away from 390, we end up 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.

Step 11:
83 goes into 580 6 times with a remainder of 82.
The number 6 becomes the next digit in our result. 
Result so far: 7769.86746
Subtract 498 from 580 to 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.

Step 12:
83 can be fit into 820 9 times, resulting in a remainder of 73.
The number 9 becomes the next digit in our result. 
Result so far: 7769.867469
Subtracting 747 from 820 leaves us with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Let's proceed to step 13:
83 goes into 730 8 times with a remainder of 66.
Write down 8 as next digit of the result. 
Result so far: 7769.8674698
If we subtract 664 from 730, we 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.

On to step 14:
83 can be fit into 660 7 times, resulting in a remainder of 79.
Record the quotient 7 as the next digit in the result. 
Result so far: 7769.86746987
Deduct 581 from 660 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.

After the division, we end up with 7769.86746987 and a remainder of 7.9e-08.